1965 Fender Champ | Vintage Amp Restoration

[@oldguy5381]

I see potential here, good luck young man.

[@tomjammin]

I would use a two lug terminal strip for the neutral and ground. They are cheap and looks cleaner. Your method works, but a chassis screw could nick the sheathing and it could get hung up on the screen stapled to the top of the cabinet. Good video though.

[@jimcastillo8950]

Hello, question did you get your ohms on the transformer with the amp powered off and caps discharged? thank you.....

[@zjokka]

You used the wrong formula! Voltage drop Cathode / Cathode resistor gives you current in A... 11:18 calculation is wrong: 11.6 V divided by cathode resistor (470R?) = 25mA times (plate V - cathode V= 416V?) = 10.3W 11:55 11VDC - is a depleted cathode in the power tube - schematic says you should see at least 21V 13:22 OUCH 8.53V / 750 ohm = 11mA x 425 = 4.9W --- yes what I said previously: a depleted old RCA tube, have one on my desk that's doing the same thing 14::22 double ouch 7.95v / 1000 ohm= 8mA x 435V = 3.48W

[@jaysorensenIBEW]

Question, sir. When testing plate voltage, should I place negative lead to chasse, or to cathode? Uncle Doug uses the cathode, but i've seen others recommend neg to gnd. Larger readings occur with chasse reading. Thanks!

[@zjokka]

@@jaysorensenIBEW plate voltage is measured to ground -- there will still be voltage on the cathode (before resistor and cap) which would explain the difference you're measuring

[@jaysorensenIBEW]

@@zjokka Thanks for the reply. Cheers

[@giulioluzzardi7632]

If it's safe and not going to hurt anyone okay but if not well done for spotting. The aml does sound good though.

[@308Savagebolt]

Awesome, but just a little disappointed at the melted PT yellow wire sheathing.

[@RESTORATIONOFSCRAPMETAL]

cool job, like👍

[@coreyleavell6921]

It was actually pretty revelatory to see the distorted wave form. Something clicked there.

[@timbuckxxi9690]

Didn't Joe Walsh record a lot of James Gang with a champ ?

[@soundmapper]

I've have a 65 that looks like a hack learned on it at some point. If anything happens to it, I'll send it your way.

[@drew945101]

You can contact me either to facebook or instagram 👌

[@HowToBeFree]

I have a '66 vibro champ that just started producing intermittent static. Someone told me years ago what that likely is if it does that. Anyone?

[@drew945101]

Probably the preamp tube. Tap on it with a pencil and see if it's reactive to that. If so, replace.

[@HowToBeFree]

@@drew945101, thank you.