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Re: SONY Model
Jay Heyl
On Thu, Jan 6, 2011 at 22:32, dhsatyadhana <dhsatyadhana@...> wrote: Remarkably, the SRF-59 and M37W, both available widely here, are not even mentioned. I noticed a couple weeks ago the SRF-59 was no longer listed on the SonyStyle web site. I wondered if they were discontinuing it.
-- Jay
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Oh boy, oh boy, oh boy! (darn it)
Peter Laws
XYL missed the letter carrier yesterday, but I picked up my Tecsun
PL-606 at the USPS today! Whoo hoo! Unfortunately, with RTTY Roundup this weekend, I won't have much time to start logging DX ... well, not MW DX, anyway. Nice - 2 NiMH bats, USB cable (unfortunately with a Mini-B and mot a Micro-B like my Blackberry), extended whip antenna, long wire antenna, nice carry bag. Way cool! Much smaller than I expected! -- Peter Laws | N5UWY | plaws plaws net | Travel by Train!
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Re: SONY Model
lrdheat
--- On Fri, 1/7/11, farmerik wrote:
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Re: Batteries and Corrosion
seta <michael.setaazul@...>
Brian,
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Play safe! If not in weekly use, take out the batteries !!! Reinsert them when needed. Some will leak sooner, others later. The very minor inconvenience is negligeable compared to damage caused by leaking batteries. Michael UK
----- Original Message -----
From: "Jerry" <brianalexmiller@...> To: <ultralightdx@...> Sent: Friday, January 07, 2011 8:10 PM Subject: [ultralightdx] Batteries and Corrosion Not necessarily on the ULR topic, but I wondered if someone here might be able to give me definitive information on the following: I have acquired several radios since I first got into the DX hobby last February. Most all of them, including superadios, RF-2200, ICF-2010 and others have batteries in them. I don't use them all on a daily or even weekly basis, but the batteries are still in them. How long would it be before I should take the batteries out to avoid that nasty orange stuff to appear in the battery compartments? Thanks - Brian Berkley, MI ------------------------------------ Yahoo! Groups Links
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Batteries and Corrosion
Brian Miller
Not necessarily on the ULR topic, but I wondered if someone here might be able to give me definitive information on the following:
I have acquired several radios since I first got into the DX hobby last February. Most all of them, including superadios, RF-2200, ICF-2010 and others have batteries in them. I don't use them all on a daily or even weekly basis, but the batteries are still in them. How long would it be before I should take the batteries out to avoid that nasty orange stuff to appear in the battery compartments? Thanks - Brian Berkley, MI
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Re: SONY Model
Rik
Not an ULR, but I see a good sized portable with CQUAM AM stereo at Audio Cubes. - FARMERIK
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--- In ultralightdx@..., Antonios Kekalos <akekalos@...> wrote:
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Re: Is it possable to use a 450/455 KC BFO with the new "DSP" radios? i.f. ?
seta <michael.setaazul@...>
Stephan,
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Ja, es ist bereichernd einen deutschen Meister mit an Bord zu haben! I imagine the best option for DSB or SSB would be to insert a very stable oscillator signal as a surrogate carrier at the received signal frequency. A narrow filter uldx receiver would probably digest this reasonably well. A stable, variable VLF oscillator searching out the presumed very-low IF might work. However, the question arises : why bother? If I wanted SSB, I would go heretic and use a non-uldx receiver, such as the Eton E5 etc. Help! What are this stake and the brushwood for ??? Michael
----- Original Message -----
From: "dhsatyadhana" <dhsatyadhana@...> To: <ultralightdx@...> Sent: Friday, January 07, 2011 4:10 PM Subject: [ultralightdx] Re: Is it possable to use a 450/455 KC BFO with the new "DSP" radios? i.f. ? Stephan: Danke sehr! I heard from another person whose images indicate that the IF is around 32 khz, so I think you're right - there is something else going on besides the traditional twice-the-IF imaging going on. I too wish for the next chip to have SSB/BFO, as well as a way to clear up the various tones/hets that are on several frequencies on all SI-473X DSP receivers I have. Kevin --- In ultralightdx@..., "Stephan Schaa" <schaa@...> wrote:
------------------------------------ Yahoo! Groups Links
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FS: Grundig G8, CCRadio-SWP
thwitherspoon
Hi Group,
I have a Grundig G8 and C.Crane Radio-SWP for sale. Both are in very good condition. No mods have been done to either. Just thinning the herd. :) $40 each including shipping via USPS to the lower 48 states. Cheers, Thomas
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Re: SONY Model
Kevin Schanilec
That's interesting that it took so long to ship. It seems that the T615 is getting less and less common, so perhaps they needed to get some more? The T615 used to be fairly common on Taobao in China, but the last time I checked there was only 1 for sale.
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Kevin
--- In ultralightdx@..., Antonios Kekalos <akekalos@...> wrote:
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Re: Is it possable to use a 450/455 KC BFO with the new "DSP" radios? i.f. ?
Kevin Schanilec
Stephan:
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Danke sehr! I heard from another person whose images indicate that the IF is around 32 khz, so I think you're right - there is something else going on besides the traditional twice-the-IF imaging going on. I too wish for the next chip to have SSB/BFO, as well as a way to clear up the various tones/hets that are on several frequencies on all SI-473X DSP receivers I have. Kevin
--- In ultralightdx@..., "Stephan Schaa" <schaa@...> wrote:
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Re: Differences between ULRs and SDRs
seta <michael.setaazul@...>
A very helpful overview of the difference between software and
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hardware versions, Rick. I, for one, would be most interested in your report on the Elektor in due course. Maybe true SDR could become a new thread because of its relevance in comparison with uldx receiver technology. Michael, UK
----- Original Message -----
From: "Rick Robinson" <w4dst@...> To: <ultralightdx@...> Sent: Friday, January 07, 2011 2:39 PM Subject: [ultralightdx] Differences between ULRs and SDRs The Si473X based ULR radios are not software designed radios, they are hardware based. The Si473X family use an external enbedded code microprocessor to send the commands to the Si chip to control frequency, bandwidth, etc. This is the same as any digital radio be it a CCrane SWP or an Eton E10. There is software, or firmware, in the microprocessor that gives the Si4734 its commands, but this is not "software designed radio". A true SDR, see the Elektor SDR receiver or RFSpace receivers, have no RF components other than front end bandpass filters. All the functions of the Si4734 hardware are done in software with an SDR design. An SDR relies on the sound card of a computer along with special software to perform all the functions the Si4734 receivers perform with hardware. The DSP functions of the ULRs are performed with hardware designed into the IC while the DSP of an SDR is performed by the control software. SDR receivers use what is called an I/Q mixer and output 2 signals, the I and Q outputs, to the sound card. The Si4734 based chips and no I/Q output. ULRs are "stand alone" receivers, SDRs are not. SDRs must have a sound card to operate and SDRs have no problem with AM, FM, CW, SSB, and multiple bandwidths since all of this is done with software. This is why the ULRs would have a problem with adding a BFO while SDRs have no problem with multiple modes. For $1.80, you can download the Elektor article on the Elektor SDR radio. This is a very informative article on the basics of SDR radio. For about $160 including shipping to the US, you can buy an assemble and tested Elektor SDR and a nice selection of free SDR software to explore. My Elektor SDR is on the way and if anyone is interested, I'll post a report to the ULR list even though it is off topic. Good DXing, Rick W4DST
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Differences between ULRs and SDRs
Rick Robinson <w4dst@...>
The Si473X based ULR radios are not software designed radios, they are hardware based. The Si473X family use an external enbedded code microprocessor to send the commands to the Si chip to control frequency, bandwidth, etc. This is the same as any digital radio be it a CCrane SWP or an Eton E10. There is software, or firmware, in the microprocessor that gives the Si4734 its commands, but this is not "software designed radio".
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A true SDR, see the Elektor SDR receiver or RFSpace receivers, have no RF components other than front end bandpass filters. All the functions of the Si4734 hardware are done in software with an SDR design. An SDR relies on the sound card of a computer along with special software to perform all the functions the Si4734 receivers perform with hardware. The DSP functions of the ULRs are performed with hardware designed into the IC while the DSP of an SDR is performed by the control software. SDR receivers use what is called an I/Q mixer and output 2 signals, the I and Q outputs, to the sound card. The Si4734 based chips and no I/Q output. ULRs are "stand alone" receivers, SDRs are not. SDRs must have a sound card to operate and SDRs have no problem with AM, FM, CW, SSB, and multiple bandwidths since all of this is done with software. This is why the ULRs would have a problem with adding a BFO while SDRs have no problem with multiple modes. For $1.80, you can download the Elektor article on the Elektor SDR radio. This is a very informative article on the basics of SDR radio. For about $160 including shipping to the US, you can buy an assemble and tested Elektor SDR and a nice selection of free SDR software to explore. My Elektor SDR is on the way and if anyone is interested, I'll post a report to the ULR list even though it is off topic. Good DXing, Rick W4DST
On 1/7/2011 8:27 AM, Gregory wrote:
The DSP radios are using what is called "Software Defined Radio".
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Re: Is it possable to use a 450/455 KC BFO with the new "DSP" radios? i.f. ?
Gregory <gs-raven@...>
The DSP radios are using what is called "Software Defined Radio".
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Adding CW and SSB demodulation would be done in the software. I think the big hurdle for these particular radios is the 1 KHz local oscillator steps are too large. The frequency synthesis would have to be redesigned for something like 50 Hz steps. It's possible as my "Buzz Aldrin" radio has small step synthesis. If you are interested in SDR radio check out the yahoo groups soft_radio and sdr-iq. What these radios are capable of is astonishing. The PL-380 and similar radios give you just a slight taste of what they can do. 73 Greg
--- In ultralightdx@..., "jimmy" <jimmyyearwood@...> wrote:
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Re: SONY Model
Antonios Kekalos <akekalos@...>
FWIW I ordered a Sony T615 from Audio Cubes II. I placed my order on the 15th of December and just got the email saying it was shipped on the 7th of January. You can check their web site to see what else may be available.
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On Fri, Jan 7, 2011 at 6:26 AM, pe1etr <pe1etr@...> wrote:
--
Tony, N4RNI Traverse City, MI EN74dq FISTS #14949, SKCC# 7117, NAQCC# 4774, QRP ARCI 7407, SWLR-RN072, WA8050SWL Not every conspiracy is a theory-AMC's Rubicon
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Re: SONY Model
Peter 1956
The caption with a blue background at the start of the video says the receiver is a SRF-M606, so it is probably that one :-)
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Peter, Blackpool UK
--- In ultralightdx@..., dypete@... wrote:
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Re: Is it possable to use a 450/455 KC BFO with the new "DSP" radios? i.f. ?
Stephan Schaa <schaa@...>
I think there's no common IF at all. The chip mixes the HF
Signals down direct to baseband, maybe at 8 - 10 khz or so(I/Q baseband mixer).
There it makes the analog to digital conversion.
The images of local stations are probably some miximg effects
in either the external compontents ( (L Tank, HF Amp, AM/SW Switching....) or
mixing effekts inside the chip which tunes by switching on/of some parallel
capactors.
Becaus of this internal strucure it's not possible to
add a extra BFO to get SSB reception. At the moment I even doubt that SI
could add such a feature. But I hope for more in their next
design.
73,
Stephan
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Re: SONY Model
Kevin Schanilec
Here is what Sony is claiming to be their overseas models (i.e., not meant for sale in Japan, I presume):
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http://www.sony.jp/overseas/lineup/radio_en.html The T615 is still in there (hey - why mess with a good thing?). Remarkably, the SRF-59 and M37W, both available widely here, are not even mentioned. The little T46 and R46 look interesting - I wonder if they are the SRF-59 with a speaker??? They are not available in the USA as far as I can tell, but there are lots of Japanese sellers with them. On Taobao, the Chinese version of eBay, they would probably run 60 bucks after all is said and done, a bit steep IMHO. Kevin
--- In ultralightdx@..., "farmerik" <farmerik@...> wrote:
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Re: SONY Model
Kevin Schanilec
I tried to figure it out for the M806 a couple years ago, and I had a way to do it through the German Amazon site. However, between the dollar/Euro exchange rate and the shipping cost, it would have been way too expensive. With that, combined with the possibility of it it not tuning a 9/10 khz splits and/or not tuning past 1600 khz, I quickly lost interest :-)
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Any one else tried??? Kevin
--- In ultralightdx@..., "farmerik" <farmerik@...> wrote:
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Re: SONY Model
Rik
Speaking of SONY radios made to sell in other parts of the world than the USA, does anyone know of a place to order them from the USA? I know about Royal Trading on eBay, but they don't have too many models.- FARMERIK
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--- In ultralightdx@..., "dhsatyadhana" <dhsatyadhana@...> wrote:
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Re: SONY Model
Kevin Schanilec
Looks like it is the Sony SRF-M606 or SRF-M806. I recall doing some research into these models, which are essentially the same as the vaunted T615 except it was difficult to tell if either version tuned in 9 and 10 khz steps and/or covered the 1600-1700 portion of the band (there are American and European version, I believe). They are about the same price as the T615, so probably stick with a known quantity:-)
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Kevin
--- In ultralightdx@..., dypete@... wrote:
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