[Amps] Alpha 77SX forward & reverse W not working

[Martin Sole]

I had the same problem with my early 77D, so early the fwd ad rfl meter 
is open wired on tag strips, no pcb. I just replaced the diodes, seems 
they have a finite life. Likely you have a similar problem. I had the 
detector diodes go in my Alpha 78 as well a while ago.

Martin, HS0ZED


On 29/03/2019 09:34, Gary Smith wrote:
> Another hiccup in getting this old girl
> back into shape. I rarely use the watt
> meter in the amp, I use the one in the P3
> and on top of the amp is a LP-100A, those
> always handle my needs. As a general rule
> I leave the multimeter in the Grid setting
> and always use that.
>
> When I had a look see in the amp to see
> what was what was going on with the
> padding caps, all seemed to go well, no
> unexpecteds happened but with reassembly I
> tried using the watt meter and found it's
> barely working; the meter moves but very
> little. The last time I used it 4-5 months
> ago, it worked well.
>
> No telling if I somehow bumped something
> but is there a likely first thing to look
> at? The meter movement is fine, works
> seamlessly with grid current.
>
> 73,
>
> Gary
> KA1J
>
> P.S. I received all the new  High Energy
> 7.5KV 9A doorknobs to replace the old
> Jennings and Centralab 1A variety. Waiting
> for the Ameritron choke and some silver
> plated flat wire to come in and I'll get
> them installed. It'll be nice to have the
> tank upgraded.
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps