[R-390] SSB Converters
[email protected]
[email protected]
Tue, 14 Jan 2003 08:56:58 +0100
Hi Friends,
yesterday evening (late evening) I was in wrong when I spoke
of Diode Load, but Tom here describe the scheme and connections of the di=
ode
bridge very well. In my experience (I put this little circuits on both my=
R-390A/URR) you mus set the receiver controls as follows:
Line Meter : + 10
Line Gain : 7-8
AGC : slow or medium
Bandwidth : 2, 1, 0.1 kHz as needed
BFO Pitch : as needed -/+ 1
BFO : on
RF GAIN : 10
Function : AGC
Local Gain : for desired volume
You must tune in an SSB signal, line level meter should read 50-75 on aud=
io
peaks, you can regulate Line Gain if you put Line Gain to 0 the adapter
is turned off, in other words this has the same effect as remofing the ad=
apter
from receiver. Try, no risk, very low cost, good results (you shall judge=
),
you don't need to regulate RF Gain thereafter. In my personal opinion th=
e
SSB converter is a nice object but don't add anything to the results that=
you can get with this circuits that worth 4 USD maximum (including your
time). Federico
P.S. : I agree with Tom an all.
>-- Messaggio originale --
>From: "Tom Bridgers" <[email protected]>
>To: <[email protected]>,
> "Scott, Barry (Clyde B)" <[email protected]>,
> "R390 (E-mail)" <[email protected]>,
> "Roy Morgan" <[email protected]>
>Subject: Re: [R-390] SSB Converters
>Date: Mon, 13 Jan 2003 20:02:48 -0500
>
>
>Fellow 390 Enthusiasts...
> The diode bridge is sold by Rick Mish, and it has been written about=
>in
>ER. It is also shown on page 89 of Viappiani's book (in Italian) about
the
>390A. If you don't have Viappiani's book, I recommend it. It has A LOT=
>of
>good stuff. Of course it IS in Italian, but most of the circuits are in=
>English. And those that aren't, I've been able to figure out what is go=
ing
>on.
> The heart of this SSB module is a traditional bridge circuit of 4 di=
odes
>(probably
>4148's). The (+) lead goes to term. 16, the ground on the R-390A. One
AC
>leg goes to terminal 13 of the line audio out. The other AC leg has a
600
>to 10K ohm resistor (just which value is chosen I don't know) in series
with
>it, between the AC leg and teminal 10 of the line audio out. The (-) of=
>the
>bridge is connected to terminal 4 of the AGC. All terminals are those
found
>on the back of the R-390A.
> I have a couple of these "modules" and have not found them to be
any
>improvement over just using standard settings for listening to SSB on a
>R-390A. I've recently acquired a CV-591A, and the one I have isn't that=
>much better either. Of course, YMMV.
>73's,
>-tom
>
>
>
>----- Original Message -----
>From: Roy Morgan <[email protected]>
>To: <[email protected]>; Scott, Barry (Clyde B) <[email protected]=
om>;
>R390 (E-mail) <[email protected]>
>Sent: Monday, January 13, 2003 5:12 PM
>Subject: RE: [R-390] SSB Converters
>
>
>> At 11:01 PM 1/13/03 +0100, [email protected] wrote:
>> > in my personal opinion an R-390A/URR, proper aligned and
>> >fitted with a diode bridge on the Diode Load on the rear terminal boa=
rd,
>> >don't need an SSB converter.
>>
>> Federico,
>>
>> Please tell us how a diode bridge on the Diode Load connector helps
>receive
>> SSB signals.
>>
>> I have not heard of this method.
>> Thanks,
>> Roy
>>
>>
>> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
>> 7130 Panorama Drive, Derwood MD 20855
>> Home: 301-330-8828 Work: Voice: 301-975-3254, Fax: 301-948-6213
>> [email protected] --
>>
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