SB-10 Sideband Adapter Question

[Peter A Markavage]

It could be previous owner had some instability on some bands in the RF
output section, and the wire to ground and in close proximity to the
tube, was used to settle it down. There were a number of hints and mods
for the SB-10 in QST,CQ, and 73. There was also an upgrade article in CQ
in 1970, and several articles to get the SB-10 to work with other rigs
and other  bands. Remove the wire and test the SB-10 on all bands for
proper operation. I would recommend replacing the carrier null pots with
5 or 10 turn devices. Makes for a smooth adjustment of carrier null and
less constant diddling with both controls to keep the carrier suppressed.

Pete, wa2cwa
www.manualman.com

On Mon, 23 Jan 2006 21:12:30 -0800 digital-conjurers at ADELPHIA.NET writes:
> Am in the process of restoring an SB-10...and found something really 
> wierd.  
> 
> One of the 6BQ5 RF Output tubes has been left unshielded, (no can) 
> and a 3" piece of hookup wire connected to ground, then run along 
> the tube's length, right next to it, and taped to the 
> chassis-mounted tube shield twist-lock socket to hold it right next 
> to the tube.  This is either:
> 
> 1. The laziest thing I have ever see someone do who lost a tube 
> shield, or 
> 2. Some exotic fix for some condition the SB-10 is prone to.
> 
> (I don't have an assembly manual, and the one up at BAMA is a 
> partial,  with the comment that the contributor didn't think 
> scanning the whole manual was "worth it".  Probably wasn't, until 
> now. <sigh>)
> 
> Ideas, anyone?  ;)
> 
> Thanks,
> 
> Lin/KJ6EF

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