I have done a fair amount of comparing the PL-390 with my Sony 7600GR, and
have determined that the PL-390 is a bit better throughout the band: not a
big improvement or anything, but it does have an edge over the Sony. So,
the PL-390 stacks up quite well IMHO.
However, the 7600GR must have a separate LW coil on the ferrite, since it
is significantly more sensitive on LW than the PL-390.
> Thanks Rick,
> Glad to know the '310 mod worked. I too am dismayed by the quality of the
> warped ferrite rods.
> You asked about the ferrite in the '390 and how that radio compares to
> other ULR's. Well in my '390 the ferrite rod is 4 5/8 in (117 mm) long
> and 0.4 in (10 mm) diameter with two opposing flattened faces- a
> substantial improvement compared to the '310, which is the only ULR I have
> for comparison.
> A rough and unscientific
test, comparing weak and non-fading stations on
> the '310 and '390 radios, showed about a 5 dB RSSI and SNR advantage to
> the 390 consistent through LW and on up to around 1200-1300kHz on MW. The
> high end of MW (>1300 kHz) could be much closer between the two radios
> although I didn't have enough candidate stations to do more measurements
> so that is only a speculative conclusion at this stage. A sig gen driving
> a standard loop a la Gary DeBock's tests would be needed to sort this out.
> Laurie Mann
> Perth, Western Australia
> --- In ultralightdx@...
, Rick Robinson wrote:
>> Hello Laurie,
>> You've got to wonder what is
going on with Tecsun and these "warped"
>> bars. I got a new PL-310 last week and it has one of the crooked bars
>> in it just like your '310 and '390. Within 2 hours of receiving my new
>> '310 I had installed your antenna mod and rewound the bar antenna.
>> Thanks again for posting that mod. That makes for a much more
>> versatile MW antenna setup. Now I can plug and unplug my 20cm bar
>> antenna at will.
>> How is the '390 performing down under compared to other ULRs? Also how
>> long is that bar? I did notice that the '310 has a 10cm bar compared
>> to the 8cm bar in the '380.
>> > Hello All,
>> > I recently received the Tecsun PL-390 and I have performed a mod to
>> use the existing FM/SW antenna socket to accommodate external LW/MW
>> antennas, as was done with the
PL-310. A file documenting the
>> procedure for the PL-390 mod has been uploaded to the Files area.
>> > Regards,
>> > Laurie Mann
>> > Perth, Western Australia