[Heathkit] SB-104/A large signal capability

[allen3500]

Great job Ulrich!
I have several of these old SB-104/A around here.
Looks like this could be a fun rainy weekend project this winter to 
improve one of them.
Thanks and 73,
Benton   wb5twc

Ulrich Graf wrote:
> Hello to the list,
>
> since I got only one response and did not get the posting myself here
> it comes again:
>
> There is certainly a number of operational SB-104s around. Originally
> this radio suffers a lot from intermodulation distortion. So the A
> version changed from dual gate mosfet mixers to diode ring mixers.
> Anyway large signal capability is very poor due to some design
> deficiencies. I modified my restored rig to an extend that even in
> Europe with strong shortwave BCers operation is successfully possible.
> If you're interested in these mods just visit my web-site at
>
> www.mydarc.de/dk4sx
>
> In chapter restauration scoll down to the SB-104 and to the
> explanations in English. Have fun reading.
>
> 73, Uli, DK4SX
>
> No virus found in this incoming message.
> Checked by AVG - http://www.avg.com 
> Version: 8.0.138 / Virus Database: 270.4.7/1546 - Release Date: 7/11/2008 6:47 AM
>
>
>
>