C-lator hum
Moderators: pompeiisneaks, Colossal
Re: C-lator hum
probably short circuit with the chassis, but also wrong type of bolt is used.. need to be "flat" head
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Re: C-lator hum
strange that heaters are burnt, maybe integrated fuse inside? the other voltages are live?
Re: C-lator hum
They are open, as in infinite Ohms... Can't believe they are burnt. That should have shown. So somewhere in the coil there is breakages, right? Too hard handling of the wires? Did I pull them too hard? I did handle them carefully.
- martin manning
- Posts: 13311
- Joined: Sun Jul 06, 2008 12:43 am
- Location: 39°06' N 84°30' W
Re: C-lator hum
Doesn't seem likely, and as I said above if you had created a shorted turn with the rack case, you would see/smell burning, or the line fuse would have opened. Maybe it is a case of infant mortality.
- martin manning
- Posts: 13311
- Joined: Sun Jul 06, 2008 12:43 am
- Location: 39°06' N 84°30' W
Re: C-lator hum
The data sheet does not indicate that there is any sort of internal fuse.
e-mail the supplier and ask them if you can send it back to them and get a replacement. Rats, this was looking lake a good fix.
e-mail the supplier and ask them if you can send it back to them and get a replacement. Rats, this was looking lake a good fix.
Re: C-lator hum
Yes will email them. Must be a defective unit, I hope.
Re: C-lator hum
I am 100 % sure that the head of that bolt did not touch the top of the chassis. There is at least 5 mm clearance. But thanks for the suggestion.
Re: C-lator hum
Very strange, this is first time in my life to hear that..
ok heaters are dead.. Wire is kinda thick and im sure it can handle shortly at least 5 amps.
So im suspexting the fault in joint where is external PVC wire connected to the internal wire (wound enamelled wire) , maybe joint is broken or so, loose. If you can check, maybe heaters are wound on top layer, so with removing the insulation, digging inside you can find broken point and remake the connection succesfully, and at the end return the insulation foil back.
Trafo has other voltages ok, so maybe is that the only problem
Re: C-lator hum
You were right!! It works again! Thank you so much, and Martin toobepone wrote: ↑Sat Apr 06, 2024 1:14 pmVery strange, this is first time in my life to hear that..
ok heaters are dead.. Wire is kinda thick and im sure it can handle shortly at least 5 amps.
So im suspexting the fault in joint where is external PVC wire connected to the internal wire (wound enamelled wire) , maybe joint is broken or so, loose. If you can check, maybe heaters are wound on top layer, so with removing the insulation, digging inside you can find broken point and remake the connection succesfully, and at the end return the insulation foil back.
Trafo has other voltages ok, so maybe is that the only problem
The problem was enameled wire. Both my probes and the solder joints did not penetrate. I scraped some on the bare solid core wire to get through the coating and now it works again! Lid on! No noise! Sounds amazing!
This thread has been a crash course 101 in tube electronics / serious general electric refresh for me. I'm so grateful to you all
- martin manning
- Posts: 13311
- Joined: Sun Jul 06, 2008 12:43 am
- Location: 39°06' N 84°30' W
Re: C-lator hum
Great to hear you’ve solved it!
I gather the heater leads are the tails of the windings, and when you clipped them you did not remove the enamel? Lesson learned, I guess!
I believe Bepone was suggesting that you tear into the torroid wrapping and look for a broken connection, which is not something I would do before asking the supplier about it.
Re: C-lator hum
Yes that's correct. Lesson learned.martin manning wrote: ↑Sat Apr 06, 2024 6:02 pm I gather the heater leads are the tails of the windings, and when you clipped them you did not remove the enamel? Lesson learned, I guess!
Finally time to let this one get some time. June '64! Now here's one thing that don't need improvement. Made right the first time
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- martin manning
- Posts: 13311
- Joined: Sun Jul 06, 2008 12:43 am
- Location: 39°06' N 84°30' W
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Re: C-lator hum
Beauty! It is truly amazing that the Tele, Strat, and P-bass were some of the earliest electric guitars, and as you said, basically perfect right out of the gate. The amplifiers have evolved some, though ;^)