Something is very strange!
All of your secondary voltages are low but for the bias voltage.
I can only make two guesses here.
1) your PT is toast due to blowing the fuse so many times.
2) your PT has a 220 volt AC primary winding and your feeding that and not the 120 winding seing as your heater voltage are near half of what they should be.
3) are the center taps for your B+ and heater winding off the PT grounded?
JCM 800 build..... No Sound at all...
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Re: JCM 800 build..... No Sound at all...
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Re: JCM 800 build..... No Sound at all...
I'm with tictac and rp--strip it down and try it again with some patience and forethought. What you have presently is a disaster waiting to happen.
What?
Re: JCM 800 build..... No Sound at all...
Imagine if he was in Europe and mis-wired the primary!Stevem wrote:Something is very strange! All of your secondary voltages are low but for the bias voltage. 2) your PT has a 220 volt AC primary winding and your feeding that and not the 120 winding seing as your heater voltage are near half of what they should be.
Re: JCM 800 build..... No Sound at all...
Are heater voltages really half of expected?
It looks like he is getting ~3.4 VAC each from pins 4+5 and 9 to, presumably, ground.
Cheers,
Dave O.
It looks like he is getting ~3.4 VAC each from pins 4+5 and 9 to, presumably, ground.
Cheers,
Dave O.
Re: JCM 800 build..... No Sound at all...
I would interpret that as 6.8VAC on the heater string.ampgeek wrote:Are heater voltages really half of expected?
It looks like he is getting ~3.4 VAC each from pins 4+5 and 9 to, presumably, ground.
Cheers,
Dave O.