[R-390] R-390 sideband adapter

[Bob Camp]

Hi

Probably the biggest single thing that needs to be done for any SSB 
adapter to work well is the (dare I bring it up ...) Dallas Lankford 
AGC mod. Without a better attack / decay ratio on the AGC SSB will be a 
problem. To work properly the AGC needs to be applied to the full 
receive chain and not just the IF. If you don't mod the radio 
internally then you need to derive the AGC externally and feed it back 
into the radio.

Another interesting challenge is that the output level from the R-390 
is a bit lower than the level that comes out of most modern radios. 
That makes matching up the radio with just any adapter a little tough.

Do you really think this SSB stuff will be around long enough to make 
it worth setting up for?

	Enjoy!

		Bob Camp
		KB8TQ


On Jan 17, 2005, at 9:23 PM, Tom Norris wrote:

> Well, I could always put 12AU7 buffers in the input and
> output, and for the *CLACK*, I could add a large relay
> mounted in the middle of a piece of sheet metal (for max
> noise) and wire it so it clacks when changing sidebands....
> Maybe build some sort of version of the AFC system
> used in the CV-157, complete with spinning disk.
>
> LOL
>
>>  The only thing missing is the *CLACK* as you
>>>  change from
>>>  upper to lower sideband. Well, that and the tubes.
>> +++++ [ Joe Foley replied]
>> Pff!
>>
>> Well, then just what good is it?
>>
>> Oh, sure it probably works just fine,........
>>
>> Joe
>>
>>
>>
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>
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