- Posted by IanMcD on August 19, 2003 at 11:10:45
I installed the C4S on one amp last night and the numbers seem high. I would appreciate someone haveing a look and giving me your comments.Terminal 15 374 VDC
Left most terminal new strip 271 VDC
B6 204 VDC **
B8 2.387 **Thanks in advance, Ian
Follow Ups:
- Re: C4S on Paramour Please comment on numbers - Matts 11:48:49 08/19/03
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- In Reply to: C4S on Paramour Please comment on numbers posted by IanMcD on August 19, 2003 at 11:10:45:
Ian,
Sounds like you're making progress. There are a lot of posts in the archives about this issue and solutions for it if you do a search for B6 & B8. However, if you want the quick & dirty, the answer is usually to replace one of the 499-ohm resistors on the C4S board with either a 680-ohm R. or a 750-ohm resistor, whichever is handy. You shouldn't even have to remove the C4S board to do it. I had similar numbers and used a 680-ohm res. from R.Shack and the numbers came into line.
Matts
- Re: C4S on Paramour Please comment on numbers - IanMcD 13:34:17 08/19/03
(1)
- In Reply to: Re: C4S on Paramour Please comment on numbers posted by Matts on August 19, 2003 at 11:48:49:
Thanks Matts, I'll give it a try. Should I put the same in the other (amp) board or test it first to see whether I get the similar readings.
Ian
PS still have he fizzle but I haven't put the C4S in the Foreplay yet. The hum was reduced but fizzle remains. The sound is great though.
- Re: C4S on Paramour Please comment on numbers - JBasham 13:53:23 08/19/03
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- In Reply to: Re: C4S on Paramour Please comment on numbers posted by IanMcD on August 19, 2003 at 13:34:17:
My experience is that you might need different resistance in the R1 position for each amp. The 12AT7 tubes vary a lot. Also some of the LEDs drop different voltages. In my Paramours, one amp was fine with the stock R1 and the other needed the R1 twiddled a little.
You need to shoot for at least 70 volts difference between the plate voltage and the B+ voltage at the top of the C4s.
- Re: C4S on Paramour Please comment on numbers - JBasham 13:53:23 08/19/03
(0)
- Re: C4S on Paramour Please comment on numbers - IanMcD 13:34:17 08/19/03
(1)
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