[Heathkit] HO-10 low vertical

[manualman at juno.com]

Did you check the coupling cap coming off the second stage going to the
plate of the 3RP1? Or hang a scope lead off the second stage of the 12AU7
to see if the tube is producing any gain.

Pete, wa2cwa

On Fri, 5 Sep 2014 20:25:19 -0700 Chuck Penson <wa7zze at gmail.com> writes:
> Hi, all. I've got an HO-10 with very low vertical response from the 
> vertical input jack on the back panel. I've checked all the 
> resistances (including the gain control), all the voltages and, of 
> course, the 12AU7. Everything checks out. I also checked the cable 
> that connects the rear panel jack to the amp. 
> 
> All other functions normal. 
> 
> It's such a simple circuit. There isn't much to go wrong. This has 
> got me a little stumped. 
> 
> Any ideas would be appreciated. 
> 
> Best,
> 
> Chuck / WA7ZZE