Date   

Re: Sony 7600GR (was Stock Sangean DT-400W Receives 6 TP's at Grayland)

satya@...
 

Hey John:

I'm in agreement with everything Gary says. I also like the
3-point-something khz SSB filter for ECSS work - SSB is quite usable after
the BFO has 15-20 minutes to stabilize (initially, it is nothing but
warbling..). I also like the continuously-variable RF gain, which makes
passive phasing of locals easier, as I can knock them down a bit to find
the null. The 910 khz images can be annoying, but would not be an issue
out at the beach. My synch doesn't have a muffled sideband - not sure how
common that is (or maybe they both are muffled, since regular AM mode has
noticeably better fidelity...).

Kevin

Hi John,

Yes, the 7600GR has "real SSB." There is a switch on the side of the
radio to select USB or LSB.

The smallest discrete tuning step (and display increment) is 1 kHz.
There is an analog SSB fine tuning control wheel that permits very
clear reception of SSB for such a small portable. It actually
receives SSB better than a 2010, because the latter uses 100 Hz
steps, but on the 7600GR the SSB fine tuning is "stepless."

Here are some other pros/cons of the 7600GR:

Pros
- Very good build quality (made in Japan, believe it or not)
- Selectable sideband sync detector (not as good as that on the
2010, Sat 800 or E1, but still useful to reduce selective fading
distortion or interference)
- Couples very well with the Quantum Q-Stick (I believe Gerry Thomas
designed the Q-Stick for use with his 7600G, which preceded the GR)
- 100 memories (10 pages of 10)

Cons
- Sound quality is somewhat muffled on AM (especially compared to
the E10 or E100)
- No tuning meter (only a "Tune" indicator on the LCD)
- No tuning knob (just fast/slow buttons -- 10/9 kHz or 1 kHz on MW,
5 kHz or 1 kHz on SW)
- One side band is usually more muffled than the other in sync mode,
as delivered (this can be adjusted fairly easily)

I hope this helps.

Regards,
Gary

--- In ultralightdx@..., "John H. Bryant"
<bjohnorcas@...> wrote:

Gary,

Thanks for your comparison of the 7600GR, the E10 and the E100.
Very interesting. I'm still looking for a small spotting receiver
and I know that Gary DeB really likes the 7600GR. Could you help
me out by describing a couple of things:

Is the SSB on the 7600GR a "real SSB," allowing the selection of
USB or LSB???

What tuning rates can you use to tune across MW in SSB??? Please
be 0.1 kHz as one choice :>)

THANKS!
John B.


Sony 7600GR (was Stock Sangean DT-400W Receives 6 TP's at Grayland)

Gary Kinsman
 

Hi John,

Yes, the 7600GR has "real SSB." There is a switch on the side of the
radio to select USB or LSB.

The smallest discrete tuning step (and display increment) is 1 kHz.
There is an analog SSB fine tuning control wheel that permits very
clear reception of SSB for such a small portable. It actually
receives SSB better than a 2010, because the latter uses 100 Hz
steps, but on the 7600GR the SSB fine tuning is "stepless."

Here are some other pros/cons of the 7600GR:

Pros
- Very good build quality (made in Japan, believe it or not)
- Selectable sideband sync detector (not as good as that on the
2010, Sat 800 or E1, but still useful to reduce selective fading
distortion or interference)
- Couples very well with the Quantum Q-Stick (I believe Gerry Thomas
designed the Q-Stick for use with his 7600G, which preceded the GR)
- 100 memories (10 pages of 10)

Cons
- Sound quality is somewhat muffled on AM (especially compared to
the E10 or E100)
- No tuning meter (only a "Tune" indicator on the LCD)
- No tuning knob (just fast/slow buttons -- 10/9 kHz or 1 kHz on MW,
5 kHz or 1 kHz on SW)
- One side band is usually more muffled than the other in sync mode,
as delivered (this can be adjusted fairly easily)

I hope this helps.

Regards,
Gary

--- In ultralightdx@..., "John H. Bryant"
<bjohnorcas@...> wrote:

Gary,

Thanks for your comparison of the 7600GR, the E10 and the E100.
Very interesting. I'm still looking for a small spotting receiver
and I know that Gary DeB really likes the 7600GR. Could you help
me out by describing a couple of things:

Is the SSB on the 7600GR a "real SSB," allowing the selection of
USB or LSB???

What tuning rates can you use to tune across MW in SSB??? Please
be 0.1 kHz as one choice :>)

THANKS!
John B.


Re: DT-400W Alignment (was Stock Sangean DT-400W Receives 6 TP's...)

Gary DeBock
 

Hi Guy,
 
     Thanks again for the suggestion of drilling small holes in the DT-400W's digital board, to gain access to the 1400 kHz trimmer and AM IF transformers on the RF circuit board.
 
     Unfortunately, after completely disassembling one of the DT-400W's and observing the circuitry and foil traces on the digital board where the holes would need to be drilled, it is obvious that such drilling would be the electronic equivalent of a total lobotomy, destroying many components and foil traces essential for the digital board's proper function. The only practical solution appears to be the construction of a 14-pin plug-in jumper cable for connection of the two boards while providing space for alignment access, and also the construction of two smaller 2-pin plug-in jumpers for the other two connecting jacks between these boards.  This obviously would involve some time and effort, but if a significant number of new DT-400W owners report alignment QC issues similar to that reported by Richard, the enthusiast group would certainly benefit from having such an alignment resource. If Richard's DT-400W sensitivity issue proves to be a rare aberration, however,  the more logical solution would be for these DT-400W owners to return the unit to Sangean reporting inadequate AM sensitivity, and requesting a full AM alignment under the 90-day warranty policy (which I would recommend for Richard as an interim solution).  Sangean obviously is capable of aligning all these DT-400W units to a very high level of broadband AM sensitivity, so why not allow them to do so, under the warranty policy?  As long as our enthusiast group lacks full DT-400W alignment capability, that would be my suggestion as an interim solution for the unfortunate recipients of marginal DT-400W units.
 
     73,  Gary     




It's only a deal if it's where you want to go. Find your travel deal here.


Re: Stock Sangean DT-400W Receives 6 TP's at Grayland

John H. Bryant <bjohnorcas@...>
 

Gary,

Thanks for your comparison of the 7600GR, the E10 and the E100. Very interesting.  I'm still looking for a small spotting receiver and I know that Gary DeB really likes the 7600GR.  Could you help me out by describing a couple of things:

Is the SSB on the 7600GR a "real SSB," allowing the selection of USB or LSB???

What tuning rates can you use to tune across MW in SSB???  Please be 0.1 kHz as one choice :>)

THANKS!
John B. 





At 07:50 PM 8/31/2008 +0000, you wrote:

Hi Dennis,

I compared the performance of several of my MW radios today, including
the 7600GR, E10, E100 and DT-200VX (all of which are stock with no
post-factory alignment).

The E10 is much better than the E100 on the low end of the band
(probably due to its much larger ferrite bar), while the E100 is
somewhat better than the E10 on the high end of the band. The 7600GR
is better than the E10 or E100 on both ends of the band. The E100 is
better than the DT-200VX on the low end of the band, and much better
on the high end of the band.

So here are the overall rankings:

Low end: 7600GR, E10, E100, DT-200VX
High end: 7600GR, E100, E10, DT-200VX

Both the E10 and DT-200VX underperform on the high end of the band,
relative to what I would expect.

Regards,
Gary

--- In ultralightdx@..., "Dennis Gibson"
wrote:
>
> Are a stock DT-400W and a stock E100 even in the same league or fair
> to compare to each other? I'm still thinking about getting one but
> I'm hesitant because the MW on my E10 isn't that great. It was
> refurbished so maybe that's why it was returned but it isn't aligned
> properly. Gary has offered to have a look at it so maybe I'll let
> him. I guess if I want an E100 I'd better get it while the single
> conversion type is still available.


Re: E100 "birdies" near 640 kHz

Gary Kinsman
 

Hi Kevin,

I live in Simi Valley, about 50 miles from KFI's location.

I was originally thinking along the same lines, but I don't have a
strong local on 1550, and rotating the radio doesn't change the
intensity of the het.

BTW, I think my E100 display is off in the opposite direction. When
the display shows 1 kHz high, the radio is tuned closer to the
desired frequency than when the display shows on frequency. In other
words, for 640 kHz, the display will show 641 kHz when tuned for
best reception.

Regards,
Gary

--- In ultralightdx@..., satya@... wrote:

Hey Gary:

You may be hearing an image two IF freqs (2 x 455 = 910) down from
a strong local, which is heterodyning with another station on 640;
do you have a fairly strong local station at 1550?

I have two locals at 1590 and 1680, and I get strong hets (if not
audio) on 680 and 770, respectively, especially during the day.
If I null 1590 and 1680, the hets down-band go away. So, maybe try
tuning to 640 and rotate the e100 to minimize the het, which might
tell you what direction the offending local is in?

Note also that the digital display on the e100 has been known to
be a khz off, so what appears to be 638 or 639 could actually be
639 or 640.

73 - Kevin S
Bainbridge Island, WA


Re: Stock Sangean DT-400W Receives 6 TP's at Grayland

Guy Atkins
 

Gary,
 
Just another thought on this. What I did on another  radio I've owned (can't remember which model), I noted that there was a small amount of unoccupied PCB directly above the trimmer. That is, the portion of the upper PCB that is directly above the trimmer on the lower board did not have a component or a circuit trace...just bare board. I drilled a small hole through the top PCB, big enough for the small screwdriver needed to make the adjustment. Ta da! easy access to the trimmer for alignment.
 
Even the relocation of a trace (jumper around the hole) or relocating a simple component like a resistor is not too tough if it is in the way of the hole needing to be drilled.
 
Guy Atkins
Puyallup, WA
 
 

-----Original Message-----
From: ultralightdx@... [mailto:ultralightdx@...]On Behalf Of D1028Gary@...
Sent: Sunday, August 31, 2008 2:17 PM
To: ultralightdx@...
Subject: Re: [ultralightdx] Re: Stock Sangean DT-400W Receives 6 TP's at Grayland

 
     Your suggestion of adjusting the 1400 kHz trimmer by a slow incremental method would certainly work well on a radio without such a hair-trigger adjustment tendency, Guy, although the risk of degrading the existing sensitivity due to an inability to "hit the peak" would be too great in the case of the DT-400W, in my opinion.
 
   
.


Re: E100 "birdies" near 640 kHz

satya@...
 

Hi Gary:

I see you're on pacbell.net, which probably means that KFI-LA on 640 is
butting heads with an image from KYCY-San Francisco, KXEX-Fresno, or
KWRN-Apple Valley on 1550, depending on where you are in California.

73 - Kevin

Hello all,

While comparing my E100 to my 7600GR and E10 -- all of which have 1
kHz tuning steps -- I hear hets near 640 kHz only on the E100, not on
the other two radios. So these hets are internally generated noises
or "birdies."

In the last day they've occurred on 637-639 kHz or 638-640 kHz, and
are strongest on the middle frequency (i.e., 638 or 639 kHz).

Does anybody else notice birdies near 640 kHz on their E100 units?

Thanks,
Gary


Re: E100 "birdies" near 640 kHz

satya@...
 

Hey Gary:

You may be hearing an image two IF freqs (2 x 455 = 910) down from a
strong local, which is heterodyning with another station on 640; do you
have a fairly strong local station at 1550?

I have two locals at 1590 and 1680, and I get strong hets (if not audio)
on 680 and 770, respectively, especially during the day. If I null 1590
and 1680, the hets down-band go away. So, maybe try tuning to 640 and
rotate the e100 to minimize the het, which might tell you what direction
the offending local is in?

Note also that the digital display on the e100 has been known to be a khz
off, so what appears to be 638 or 639 could actually be 639 or 640.

73 - Kevin S
Bainbridge Island, WA

Hello all,

While comparing my E100 to my 7600GR and E10 -- all of which have 1
kHz tuning steps -- I hear hets near 640 kHz only on the E100, not on
the other two radios. So these hets are internally generated noises
or "birdies."

In the last day they've occurred on 637-639 kHz or 638-640 kHz, and
are strongest on the middle frequency (i.e., 638 or 639 kHz).

Does anybody else notice birdies near 640 kHz on their E100 units?

Thanks,
Gary


E100 "birdies" near 640 kHz

Gary Kinsman
 

Hello all,

While comparing my E100 to my 7600GR and E10 -- all of which have 1
kHz tuning steps -- I hear hets near 640 kHz only on the E100, not on
the other two radios. So these hets are internally generated noises
or "birdies."

In the last day they've occurred on 637-639 kHz or 638-640 kHz, and
are strongest on the middle frequency (i.e., 638 or 639 kHz).

Does anybody else notice birdies near 640 kHz on their E100 units?

Thanks,
Gary


Re: Stock Sangean DT-400W Receives 6 TP's at Grayland

Gary Kinsman
 

Hi Dennis,

I compared the performance of several of my MW radios today, including
the 7600GR, E10, E100 and DT-200VX (all of which are stock with no
post-factory alignment).

The E10 is much better than the E100 on the low end of the band
(probably due to its much larger ferrite bar), while the E100 is
somewhat better than the E10 on the high end of the band. The 7600GR
is better than the E10 or E100 on both ends of the band. The E100 is
better than the DT-200VX on the low end of the band, and much better
on the high end of the band.

So here are the overall rankings:

Low end: 7600GR, E10, E100, DT-200VX
High end: 7600GR, E100, E10, DT-200VX

Both the E10 and DT-200VX underperform on the high end of the band,
relative to what I would expect.

Regards,
Gary

--- In ultralightdx@..., "Dennis Gibson" <wb6tnb@...>
wrote:

Are a stock DT-400W and a stock E100 even in the same league or fair
to compare to each other? I'm still thinking about getting one but
I'm hesitant because the MW on my E10 isn't that great. It was
refurbished so maybe that's why it was returned but it isn't aligned
properly. Gary has offered to have a look at it so maybe I'll let
him. I guess if I want an E100 I'd better get it while the single
conversion type is still available.


New file uploaded to ultralightdx

ultralightdx@...
 

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the ultralightdx
group.

File : /Galassi, Italy/WEGP 1390.rm
Uploaded by : tropicalband2000 <w.matilda@...>
Description : 1390 WEGP, SRF-59 and Moroni Monoloop

You can access this file at the URL:
http://groups.yahoo.com/group/ultralightdx/files/Galassi%2C%20Italy/WEGP%201390.rm

To learn more about file sharing for your group, please visit:
http://help.yahoo.com/l/us/yahoo/groups/original/members/web/index.htmlfiles

Regards,

tropicalband2000 <w.matilda@...>


Re: Stock Sangean DT-400W Receives 6 TP's at Grayland

Guy Atkins
 

Gary,
 
Is it possible to adjust the 1400 kHz trimmer by alternating between disassembly as needed to access the trimmer, making a small tweak to the cap, and reassembling it enough to check? With enough repeats of this cycle it should be possible to zero in on the best trimmer setting without soldering in 14 jumper wires. The only downside I can see is that too much flexing of the stock jumper wires might break a wire or solder joint.
 
Guy Atkins
Puyallup, WA
 
 

-----Original Message-----
From: ultralightdx@... [mailto:ultralightdx@...]On Behalf Of D1028Gary@...
Sent: Sunday, August 31, 2008 11:03 AM
To: ultralightdx@...
Subject: Re: [ultralightdx] Re: Stock Sangean DT-400W Receives 6 TP's at Grayland

     Any DT-400W can be easily aligned for optimum low-band sensitivity simply by peaking the loopstick coil on a 600 kHz weak signal, but this new unit's redesigned RF board has the 1400 kHz trimmer in an inaccessible position when in the operating configuration, which makes it impossible to align without multiple jumpers (which I'm sure Sangean uses for its own alignments).  Normally I would attempt to construct such an alignment setup, but with 14 close-spaced jumpers required, I decided to wait until my schedule isn't so crammed.
 
 
.


Re: Stock Sangean DT-400W Receives 6 TP's at Grayland

Gary DeBock
 

Hi Guy,
 
     Thanks for your suggestion about a possible 1400 kHz trimmer adjustment procedure for the DT-400W.
 
     As we recall, when you developed your DT-200VX alignment procedure, on the DT-200VX RF board the 1400 kHz trimmer and AM IF transformer adjustments are just barely accessible in the operating configuration (with the 14-lead plug in jack between the RF and digital circuit boards just barely making contact, as the boards are separated enough to provide access to the two adjustments).  On the DT-200VX, both of these adjustments have a "hair trigger" adjustment tendency, in which slight changes throw the whole AM alignment seriously out of the optimum position.
 
     On the DT-400W, however, the RF board has been completely redesigned, with the 1400 kHz trimmer and AM IF transformer adjustments relocated to a completely inaccessible position whenever the 14-lead connection jack has continuity.  As such, these hair-trigger adjustments cannot have optimum alignment without a technician-constructed alignment jig, connecting the 14-lead jack with enough space to provide access to the two adjustments.  This assumes that the extra RF lead lengths would not act as small "antennas," throwing off the whole AM alignment due to stray oscillations.  I assume that Sangean has such an alignment setup, so it must be possible to align the radio this way.  Unfortunately, with multiple hobby projects having higher priority here (E100 Slider Loopstick article, etc.), I haven't really had time to construct such a DT-400 alignment jig, and ensure its proper function.
 
     Your suggestion of adjusting the 1400 kHz trimmer by a slow incremental method would certainly work well on a radio without such a hair-trigger adjustment tendency, Guy, although the risk of degrading the existing sensitivity due to an inability to "hit the peak" would be too great in the case of the DT-400W, in my opinion. Long term, the only real solution is to tackle the problem head-on, build an alignment jig, and assuming that it is reasonably similar to the equipment that Sangean itself uses, hopefully have a resource where the entire enthusiast group can have optimum DT-400W alignments.  The RF design itself has a lot of promise, and with the exception of Richard's unit, quality control does seem to be above average for factory alignments.  All three test units here had fine sensitivity, straight from the factory. The price is very reasonable for such a high-sensitivity design, and after using it at Grayland two days ago, it has become my favorite TP-chasing stock Ultralight.  
 
     73,  Gary
 
       




It's only a deal if it's where you want to go. Find your travel deal here.


Re: Stock Sangean DT-400W Receives 6 TP's at Grayland

bbwrwy
 

Gary: I got the DT-400W that isn't as sensitive as my SRF-M37W and
SRF-59 (my third) I use for DXing. It is only better at the lower end
of the AM band than the E100. I guess I'll order another DT-400W and
see if it's better. As we've all discovered from using these little
wonders there seems to be misalignment issues with all of them.

Sensitivity aside, the DT-400W is the easiest of my little ultralights
to use. It's ability to null interfering signals is almost equal to
the Sony receivers. For example, I was able to log five new stations
(and a new state) by nulling WKY-930 (5 kW @ 92 km/57 mi). This
morning I nulled WWLS-640 (5 kW @ 122 km/75 mi) and heard three new
stations in a half-hour. One being KTIB, Thibodeaux LA reading orders
to evacuate the area ahead of hurrican Gustav. In my opinion the
DT-400W is a very worthwhile receiver, and I look forward to seeing
how it be modified.

Now if I can figure out a way to block out the IBOC jamming! A half a
century ago they made color TV compatible with black and whire, so why
can't they figure out how to get HD right??? But they wouldn't be
able to sell those new newfangled receiver they want us to buy!!!

Have a good DXing holiday everyone.

Richard Allen.


Re: Stock Sangean DT-400W Receives 6 TP's at Grayland

Gary DeBock
 

Hi Richard,
 
     I'm sorry that your new DT-400W isn't performing to your expectations, and yes, with other models there has been a wide variation in quality control at the Chinese factories for AM alignments.  Being aware of this, before recommending the DT-400W as a top performer, I ordered three units from Amazon and tested out all three to ensure that the high sensitivity wasn't a rare fluke.  They all performed equally well here, although it's certainly possible that all of mine were from one factory, and that other factories may not be so diligent in ensuring top sensitivity. Other DT-400W users have seemed pleased with the sensitivity so far, but there certainly could be some yellow-colored lemons around.
 
     Any DT-400W can be easily aligned for optimum low-band sensitivity simply by peaking the loopstick coil on a 600 kHz weak signal, but this new unit's redesigned RF board has the 1400 kHz trimmer in an inaccessible position when in the operating configuration, which makes it impossible to align without multiple jumpers (which I'm sure Sangean uses for its own alignments).  Normally I would attempt to construct such an alignment setup, but with 14 close-spaced jumpers required, I decided to wait until my schedule isn't so crammed.
 
      If you order another DT-400W and it also doesn't perform to your satisfaction, Richard, please let us know ASAP.  We may need to keep a serial number data base for inadequate units, like John did for the inferior "new" E100's.
 
     73,  Gary   




It's only a deal if it's where you want to go. Find your travel deal here.


another great evening propagation wise

Allen Willie
 

 
 
Hi Guys,
 
Pretty decent conditions last evening as I  added another 19 stations to my Robert Ross 30 Day Challenge list. Total now standing at 202 so far  Transatlantics and domestics were both numerous here in the Atlantic .
 
A Few logs as follows:
 
1179 khz - Sweden , Radio Sweden  Solvesborg  8/30/08  23:29 UTC  w/ Radio Sweden Interval signal, frequency mentioned and woman after in Swedish ; good
 
 630 khz - Norway, NRK1  Vigra   8/30/08  23:28 UTC  w/ pop songs including Love Me Baby in English, woman with talk in Norwegian; fair
 
1290 khz - WKBK Keene, New Hampshire   8/31/08  5:00 UTC  w/ "More Ways To Get Your News 1290 WKBK " ID then into News; fair
 
840 khz - WHAS Lexington, Kentucky  8/31/08  6:00 UTC w/ " 24 Hrs A Day, Depend On It, Newsradio 84 WHAS" ID ,Talk show ; fair
 
 
*** WHAS was logged using the SRF-39FP, all others with the SRF-M37V  *** both barefoot
 
 
73
Allen Willie
St. John's, Newfoundland
SRF-M37V and SRF-39FP barefoot


Now with a new friend-happy design! Try the new Yahoo! Canada Messenger


Re: Inside a G6 + Review Comments

starship20012001 <starship_2001@...>
 

Thank You John. I was thinking about this one back in June at the
begining of summer but passed after seeing not too great reveiws about
issues. Your review puts a final coffin nail on it.
--- In ultralightdx@..., "Gary Kinsman" <gkinsman@...>
wrote:

Hi John,

Thanks for your thoughts on the G6. Between what you said, and what
Colin said in his review, I think I'll pass.

Regards,
Gary


Re: Stock Sangean DT-400W Receives 6 TP's at Grayland

starship20012001 <starship_2001@...>
 

There must be QC issues for the E-10s and E-100s. My e-10 (e-ten)
performs above average and had excellant sensativity on MW. In fact it
does something other radios wont do. It allows MW DX without shutting
of power at the main in this noisy QHT. It also allows access to
jammed 1st ajacents o IBOC staitons with its excellant nulling abilty
and low MW noise floor. It has performed better then the Kaito 1103 on
MW. This one must be above average on QC. My eton e-100 perform aabout
average very sensative on high end of MW band with high noise floor
not bad on he lower end. As far as the DT-400 (yellow one) i was
thinking about it but i really don't need to "collect" any more
radios. I push them aside as new ones arrive like the srf-59 is
obsolete to me.
--- In ultralightdx@..., "Dennis Gibson" <wb6tnb@...>
wrote:

My DT-400W arrived yesterday. Wow! The MW sensitivity is indeed
fantastic throughout the entire band. I'm a little disappointed with
the selectivity but I don't have anything similar to compare it to
(except a Sangean DT-110, which is on the turkey list and rightfully
so) so maybe I'm expecting too much. I have five locals within seven
miles (three are only a little over one mile away) but none are more
than 1 KW at night.

I can walk to the beach but I don't know anybody in California
looking
for TP's so I don't know if hearing any from here (Santa Barbara) is
even feasible. I'd like suggestions on which frequencies I'd be the
most likely to find TP's on.

Are a stock DT-400W and a stock E100 even in the same league or fair
to compare to each other? I'm still thinking about getting one but
I'm
hesitant because the MW on my E10 isn't that great. It was
refurbished
so maybe that's why it was returned but it isn't aligned properly.
Gary has offered to have a look at it so maybe I'll let him. I guess
if I want an E100 I'd better get it while the single conversion type
is still available.

What type of batteries are you guys using? A friend says his SRF-59
isn't great with NiMH's but is really great with alkalines. I use
NiMH's in radios that charge them internally (Kaito KA1103 and E10)
and alkalines in everything else. Maybe my E10 would work better with
alkalines.

Thanks again to Gary for all of his hard work and imagination.

--- In ultralightdx@..., D1028Gary@ wrote:

Hello Guys,

With a sudden rare chance to get away to Grayland, WA for an
early
morning of DXing on the ocean beach, I couldn't wait to try out
the
three top
performers from the Summertime Shootout-- the DT-400W, a modified
E100, and
the tiny SRF-S84. I was especially interested in seeing how the
DT-400W would
compete against the previous "sensitivity king," the SRF-T615.

The SRF-T615 is an excellent, compact Ultralight, although
very pricey
compared to the DT-400W (about $120 including shipping compared to
about
$55). So how did these two perform in an actual DXpedition
environment? Well,
the two were similar on the low frequencies, and both could
receive
JOAK-594,
JOIB-747 and JOUB-774 without too much trouble. HLCA-972 was
slightly
stronger on the DT-400W, but not by much. But on the receptions
of
HLAZ-1566 and
VOA Thailand-1575, the DT-400W was really superior, making
crystal-clear mp3's
of both stations (that the SRF-T615 had at a pretty weak level).
The stock
DT-400W was able to produce an mp3 of an ID from VOA-1575 (7,200
miles) that
sounded like a local, and I'll try to upload the recording to the
ultralightdx file section soon. The Sangean managed to receive 7
DX "countries" in one
early morning (Canada, USA, Mexico, Hawaii (KPUA-670), Japan, S.
Korea, and
Thailand).

My modified E100 has been logging weak TP's since June 29,
but
it has
very fanatical sensitivity and selectivity improvements, so it's
not fair to
compare it to a stock Ultralight. During this trip to Grayland,
it
received
North Korea-657, China-1593 and a presumed Taiwan-738, which would
be its 22nd
TP catch. Developed here in Washington state together with John
Bryant and
Guy Atkins, this extremely effective E100 will be the subject of
some
upcoming technical DIY articles, so that everybody can have one of
these "secret DX
weapons."

The tiny analog Sony SRF-S84 was also a blast to use,
managing
to log
its first TP with a reception of JOUB-774. When properly aligned
(for free, by
me), this ridiculously small Ultralight has performance that can
make even a
paltry propagation morning seem like an absolute blast.

If any of you feel like AM-DXing is not as much fun as it was
before,
just take a few top-rated Ultralights to an ocean beach... and
you'll be
shocked and thrilled along with the rest of us.

73, Gary


Re: Inside a G6 + Review Comments

Gary Kinsman
 

Hi John,

Thanks for your thoughts on the G6. Between what you said, and what
Colin said in his review, I think I'll pass.

Regards,
Gary


Re: Stock Sangean DT-400W Receives 6 TP's at Grayland

Dennis Gibson <wb6tnb@...>
 

My DT-400W arrived yesterday. Wow! The MW sensitivity is indeed
fantastic throughout the entire band. I'm a little disappointed with
the selectivity but I don't have anything similar to compare it to
(except a Sangean DT-110, which is on the turkey list and rightfully
so) so maybe I'm expecting too much. I have five locals within seven
miles (three are only a little over one mile away) but none are more
than 1 KW at night.

I can walk to the beach but I don't know anybody in California looking
for TP's so I don't know if hearing any from here (Santa Barbara) is
even feasible. I'd like suggestions on which frequencies I'd be the
most likely to find TP's on.

Are a stock DT-400W and a stock E100 even in the same league or fair
to compare to each other? I'm still thinking about getting one but I'm
hesitant because the MW on my E10 isn't that great. It was refurbished
so maybe that's why it was returned but it isn't aligned properly.
Gary has offered to have a look at it so maybe I'll let him. I guess
if I want an E100 I'd better get it while the single conversion type
is still available.

What type of batteries are you guys using? A friend says his SRF-59
isn't great with NiMH's but is really great with alkalines. I use
NiMH's in radios that charge them internally (Kaito KA1103 and E10)
and alkalines in everything else. Maybe my E10 would work better with
alkalines.

Thanks again to Gary for all of his hard work and imagination.

--- In ultralightdx@..., D1028Gary@... wrote:

Hello Guys,

With a sudden rare chance to get away to Grayland, WA for an
early
morning of DXing on the ocean beach, I couldn't wait to try out the
three top
performers from the Summertime Shootout-- the DT-400W, a modified
E100, and
the tiny SRF-S84. I was especially interested in seeing how the
DT-400W would
compete against the previous "sensitivity king," the SRF-T615.

The SRF-T615 is an excellent, compact Ultralight, although
very pricey
compared to the DT-400W (about $120 including shipping compared to
about
$55). So how did these two perform in an actual DXpedition
environment? Well,
the two were similar on the low frequencies, and both could receive
JOAK-594,
JOIB-747 and JOUB-774 without too much trouble. HLCA-972 was slightly
stronger on the DT-400W, but not by much. But on the receptions of
HLAZ-1566 and
VOA Thailand-1575, the DT-400W was really superior, making
crystal-clear mp3's
of both stations (that the SRF-T615 had at a pretty weak level).
The stock
DT-400W was able to produce an mp3 of an ID from VOA-1575 (7,200
miles) that
sounded like a local, and I'll try to upload the recording to the
ultralightdx file section soon. The Sangean managed to receive 7
DX "countries" in one
early morning (Canada, USA, Mexico, Hawaii (KPUA-670), Japan, S.
Korea, and
Thailand).

My modified E100 has been logging weak TP's since June 29, but
it has
very fanatical sensitivity and selectivity improvements, so it's
not fair to
compare it to a stock Ultralight. During this trip to Grayland, it
received
North Korea-657, China-1593 and a presumed Taiwan-738, which would
be its 22nd
TP catch. Developed here in Washington state together with John
Bryant and
Guy Atkins, this extremely effective E100 will be the subject of some
upcoming technical DIY articles, so that everybody can have one of
these "secret DX
weapons."

The tiny analog Sony SRF-S84 was also a blast to use, managing
to log
its first TP with a reception of JOUB-774. When properly aligned
(for free, by
me), this ridiculously small Ultralight has performance that can
make even a
paltry propagation morning seem like an absolute blast.

If any of you feel like AM-DXing is not as much fun as it was
before,
just take a few top-rated Ultralights to an ocean beach... and
you'll be
shocked and thrilled along with the rest of us.

73, Gary