Delete post.
Moderators: pompeiisneaks, Colossal
Re: Delete post.
The variac is not intended to be used as a protection device such as described. You need an isolation transformer on your work bench.
Be careful working around tube amps.
Mark
Be careful working around tube amps.
Mark
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Reeltarded
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Re: Delete post.
Ok buddy.
Have fun and remember what I said about 10A fuse not stopping your heart from stopping.
Have fun and remember what I said about 10A fuse not stopping your heart from stopping.
Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.
Re: Delete post.
Nice looking build!
Welcome Mopar.
How does she sound?
Welcome Mopar.
How does she sound?
<i> "I've suffered for my music. Now it's your turn."</i>
Re: Delete post.
Yes apparently you have a variac with isolation, so my answer wasn't as stupid as one might think since I didn't know you were running with the combination unit.67Mopar wrote:I assumed a FUSED variac is basically an isolation transformer, or at least offer the same protection. I know 'simple' variacs have no fuse protection, so...
Re: Delete post.
Have you've drawn a schematic of the amp? What is it like? 3 or 4 gain stages? Thanks.
Re: Delete post.
+1 on what Miles says about the Variac. Lose the variac. Pay attention.
For the ground, I would avoid the star ground. It is nice in theory, difficult in practical implementation, particularly for someone who isn't well versed in how the grounds work.
If I read the pictures correctly, picture ending with #10c8c shows the pot buss connected to a grey shielded wire from which a blue wire emerges and I guess the blue connects to one of the pot lugs. Find the other end of that coax. That is your ground point for the pots. It is not necessary to ground the cases. I don't do that. Any other pot grounds that rely on that buss as "transportation" to the end-point, just use ordinary hookup wire to connect. If it hums, that can be dealt with later.
I don't like such tidy builds. Such tidiness shouldn't be possible or permitted.
For the ground, I would avoid the star ground. It is nice in theory, difficult in practical implementation, particularly for someone who isn't well versed in how the grounds work.
If I read the pictures correctly, picture ending with #10c8c shows the pot buss connected to a grey shielded wire from which a blue wire emerges and I guess the blue connects to one of the pot lugs. Find the other end of that coax. That is your ground point for the pots. It is not necessary to ground the cases. I don't do that. Any other pot grounds that rely on that buss as "transportation" to the end-point, just use ordinary hookup wire to connect. If it hums, that can be dealt with later.
I don't like such tidy builds. Such tidiness shouldn't be possible or permitted.
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Reeltarded
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- Location: GA USA
Re: Delete post.
I see what you misunderstood. Telling you the variac wouldn't help you was about staying alive, not protecting your amp.
Also, setting at XXX volts means nothing on the dial. You need to meter the AC at the variac AC output.
Also, setting at XXX volts means nothing on the dial. You need to meter the AC at the variac AC output.
Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.
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vibratoking
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Re: Delete post.
A variac may help your tone. It will do nothing for your safety. In the interestest of safety, 0.1 amps, 100mA, through your heart, arm to arm, it enough to put your lights out for good. None of the fuses mentioned will do anything for that. Please make sure you understand what the variac and fuses are really doing and not doing. What they are not doing is protecting you in any way whatsoever. Your disregard for this is alarming, at least to me.