[Amps] 811H Plate Current

[Alek Petkovic]

Set the switch to operate and short the RCA keying jack to check if 
the relays click. I had a 811H on the bench to repair and the relay 
contacts were fused which meant that the amp was keyed as yours appears to be.

Have fun. That circuit board is a real pig to work on.

73, Alek.


At 10:40 AM 28/01/2010, Daniel Hileman wrote:

>Hi All
>
>I just purchased an AL-811H. I dont have a way of keying it just 
>yet, but wanted to turn it on and look at the plate voltage, etc. 
>The unkeyed (Standby) plate voltage is about 1700, which I believe 
>is about right...but, when I flip the meter to (lp) Plate Current, 
>it shows around 120+/- mA...is this right,or should it be ZERO 
>unkeyed? It doesnt sound keyed, and sounds ok...BUT, here's what 
>sets off the bells, it seems VERY hot on the top of the case with it 
>sitting in standby for about 10 min...I used to own an 811H and dont 
>remember it running that hot, but maybe I never felt the top. Now, 
>that being said, the tubes may not be good, and the gentleman told 
>me that, and I got the amp at an awesome price, and he said if it 
>was broken he would make it right, so not worried about that, just 
>want to know if it sounds normal. Also, would bad tubes make it get 
>hot like that?
>
>
>Thanks and 73,
>Daniel N9WX
>
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