SB-110a

[mike bryce]

dave..

if you think the transformers are really out of whack, couple a scope to the
output of each section that is tuned by the transformer. then while watching
the scope, tune the transformer for max output, then move on to the next
stage and repeat. this should work provided heath wants to peak the stages
on the output of each stage and not go after a null..

Mike Bryce WB8VGE
SunLight Energy Systems

http://www.seslogic.com
http://www.theheathkitshop.com

"Electricity at the speed of light"

> From: Dave Leisman <wb8baf at VOYAGER.NET>
> Reply-To: Dave Leisman <wb8baf at VOYAGER.NET>
> Date: Tue, 17 Dec 2002 09:59:31 -0500
> To: HEATH at LISTSERV.TEMPE.GOV
> Subject: SB-110a
>
> I need some help with this "project"  I have an SB-110a and the
> receiver is great, but I am having problems with the transmitter
> section.  I can get only milliwatts out from the thing.  New driver
> tube and 2 brand new 6146 finals but still nothing.  I have gone
> through the full tune up procedure, as stated in the manual several
> times,all with the same result.
>
> I know I at least get some signal out because I can transmit into a
> dummy load and easily hear the signal on a second receiver located 30
> yards away. And I know the LMO works as well.
>
> I fear that the bandpass transformers located ahead of the driver tube
> have been turned too far out of synch and need to be "homed" so the
> thing can be properly tuned.  Turning the final tune control, the
> preselector and the load control do have some effect but with such
> nominal power output it's hard to judge exactly how much effect.
>
> In every other way the rig is great.  I use an HP-23a as power supply.
> So, any suggections would be appreciated.  This is a great rig and I
> really want the thing up and running.
>
> Thanks,
>
> Dave, W8QW
>
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> http://home.core.com
>
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