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31
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Ceriatone / Overtone / Re: ots troubles
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on: November 12, 2009, 03:30:40 PM
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Hey perhaps one of relays is turned the other way around.  I've checked and they are in the correct way Thanks |
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32
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Ceriatone / Overtone / Re: ots troubles
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on: November 12, 2009, 03:27:16 PM
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Hi Tim, My suggestion was not the check ground on the 05 cap, but instead to check if the cathode resistors (2.2) and caps (5 uF) were grounded. however, judging by your new V1 and V2 pin8 voltages of 1.7 and 1.8 volts. It now looks like the cathodes are grounded, so forget about that.  Just to make sure the signal is ok......can you hear the noise level (in the speakers) go up, when you engage the OD? From your description above, I would guess you can. My suspicion is the wiring of the input jack socket, which can be a little tricky, with various connectors and all. For testing purposes, you could try to solder another (simpler) jack socket with a piece of shielded cable direct to pin2 on V1 and ground. Obviously, if that works, your chassis mounted jacksocket is wired wrong.  Thanks for the replies guys I have no noise level at all even with volumes cranked and od engaged there is nothing I do get a audible click or pop when I flick the standby switch on I will try and hook up a jack to pin 2 and see if that works |
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33
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Ceriatone / Overtone / ots troubles
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on: November 12, 2009, 07:32:51 AM
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I guess I'll repost what I have done again since my last post is mia
I've have no sound
v1 pin1=193 pin3=1.8 pin6=202 pin8=1.7
v2 pin1=200 pin3=1.9 pin6=207 pin8=1.8
v3 pin1=301 pin3=60 pin6=301 pin8=60
v4 pin3=463 pin4=461 pin5=54 pin6=463 pin8=.039
v5 pin3=463 pin4=462 pin5=54 pin6=463 pin8=.027
I have sound when I plug into power amp in
I have sound when checking volts on v3
I've checked and double checked input wiring and solder joint
all wiring is correct on v1,2 and 3
all solder joints on v1,2 and 3 are nice and shiny
I.ve swapped v1,2 and 3 with 6 different 12ax7 tubes
I have no sound at all even with overdrive section cranked
I've tried to upload pics but everytime I do the thread becomes unreadable
So what would the next step be?
I was asked to check ground on 05 cap on the - side but the cap does not have + or - signs on it. That was one of the pics I was trying to upload
I get a reading from both sides of the cap but I don't see where it would be grounded
thanks for any help
Tim
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37
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Ceriatone / Overtone / Re: finished...are these voltages ok?
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on: November 11, 2009, 03:52:29 PM
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I've tried 6 different tubes (all new)
there is no noise at all... dead quite
yes I heard noise when taking voltages
I've checked and double checked input wiring and it seems to be ok
I don't know what to do next
Thanks for helping
Tim
What about if you engage the OD and crank those pots, any noise? If you would detect some noise, at least you would know something is wrong with V1 and this will narrow down your search. My guess would be that V1 has some issues.  Tried that and still nothing reflowed all the pins on v1 and nothing |
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38
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Ceriatone / Overtone / Re: finished...are these voltages ok?
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on: November 11, 2009, 07:37:34 AM
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Did you try to change V1,V2,V3 tubes with something you know it works?
If you crank the Volume knob, ... is the noise level the same or it changes with more volume?
When you measured the plate voltages, did you hear any click sound coming out your speaker?... Especially when measuring the V3 tube.
I've tried 6 different tubes (all new) there is no noise at all... dead quite yes I heard noise when taking voltages I've checked and double checked input wiring and it seems to be ok I don't know what to do next Thanks for helping Tim |
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39
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Ceriatone / Overtone / Re: finished...are these voltages ok?
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on: November 11, 2009, 02:59:48 AM
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opps I was measuring pin 9 instead of 8 on v1 v2 v3
v1 and v2 are 1.7 and v3 is 60
what is the next step to in find out why there is no sound?
I plugged a cable in the power amp and it works
thanks for helping me out
Tim
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41
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Ceriatone / Overtone / finished...are these voltages ok?
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on: November 10, 2009, 06:11:22 AM
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Finished building my OTS
started it up with a current limiter and it looked good so I fired it up
no sound ...so I'm hoping some of you fine gents can help me out
V1 pin1=193 pin3=1.8 pin6=202 pin8.001
V2 pin1=200 pin3=1.9 pin6=207 pin8=.001
V3 pin1=301 pin3=59 pin6=301 pin8=.001
V4 pin3=463 pin4=461 pin5=54 pin6=463 pin8=.039
V5 pin3=463 pin4=462 pin5=54.5 pin6=463 pin8=.027
The bias on v5 is 27 and v4 is 39
Is this normal to be that far apart?
I'm guessing the low numbers on pin8 of v1,2 and 3 is the reason for no sound
I'm still learning the ropes so please take it easy on me
Thanks for any help
Tim
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43
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Ceriatone / Overtone / Re: Overtone Layout
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on: October 28, 2009, 02:43:39 PM
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This is probably a dumb question....but that is the schematic, correct? Is there a front panel layout anywhere that discusses the controls and what they do, as well as the internal trim controls? (i guess something like a MANUAL) Just wondering which layout is correct? This one is a bit different than the one from the order page I've been using Why is it different? |
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45
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Ceriatone / Overtone / Re: OT wires?
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on: October 27, 2009, 02:24:00 PM
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Now I'm confused
My layout shows brown wire to pin 3 on outer tube
and I think the black wire goes to the speaker jack
Correct?
I think my printer might be my problem
It might be low on ink
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