[R-390] Single Sideband reception with the R-390/R-390A

[Les Locklear]

Well, I have used several of those listed. None will work the way they are 
intended to unless you address the attack and release times of the stock 
R-390A.

My personal favorite was the PD-1 using an older receiver/amplifier and 
large speaker. The ssb capabilities of the R-390A using the 2 kc filter are 
superb, and the audio was fantastic for ssb!

The best agc mods can be found on the Hollow State Newsletter website. 
Dallas Lankford published those mods years ago and they work great.

Les Locklear
Gulfport, Ms.
Professional Curmudgeon & Equal Opportunity Annoyer

----- Original Message ----- 
From: "Brad Huff" <huffb at avalon.net>
To: <r-390 at mailman.qth.net>
Sent: Thursday, January 19, 2006 3:54 AM
Subject: [R-390] Single Sideband reception with the R-390/R-390A


Gentlemen,
I would like to thank all of the people that responded to my signal 
generator question a few days ago. I received responses within minutes of my 
posting. Unbelievable! That is what makes this group so great. I would now 
like to open a discussion about single side band reception with the 
R-390/R-390A series receivers. For the purpose of this discussion let us 
assume that the radio has been altered such that the AGC has been modified 
for proper SSB reception.  I have had experience with:
1) the radio with no external adaptors and increased BFO injection.
2) a CV-591A SSB adaptor.
3) a Hammarlund HC-10.
4) a Central Electronics Sideband Slicer.
5) a Sherwood Engineering SE-3
6) a PD-1.
I have not had any experience with the Capt. Lee onboard product detector 
mod or a couple of the home brew units that are out there. I have schematics 
and have ordered parts for one of the home brew units I just have not had 
the time to build it yet so I can not comment on these. The adaptors that I 
have mentioned are not necessarily in any particular order as far as 
favorites, I just listed them as I thought of them.
They all work. Some work better than others, and some folks can probably 
detect differences in the various units better than my tin ear. That is 
where you guys come in. I am curious as to your experiences and what you 
feel are the best units. Maybe we could rank the units that I have 
mentioned. Some units require external hardware to operate, that is, 
external amplifiers etc.. Some units will allow the audio to be fed back in 
to the receiver at the rear of the unit. Much has been written about the 
quality of the stock audio but I have found that the audio is quite 
acceptable if the audio deck is altered using Mike Murphy's suggestions. Any 
thoughts? Please respond to the entire group, it will be interesting to see 
what everyone's experiences are.-Brad
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