Hot Rod Deluxe is dead.

[galtjunk]

I was in a pawn shop today an a guy was playing a Hot Rod Deluxe. It was working fine. He leaned over and tipped the amp to look at the speaker and the amp fell on its face. It wasn't a huge drop, it just tipped over and went dead.
I checked the fuse and the switches and they are all good. I have 120v ac going into the pt but nothing coming out. No heaters, no lamp, no ac anywhere.
Would this minor bump kill the pt?

I bought the amp for a hundred bucks, I figured that the cabinet, speaker and tubes were worth that much.

[xtian]

You got your volt meter out, confirmed there is 120 ac on the PT primary, and nothing on any secondaries? Have to ask the obvious, because it's not likely a tipover is going to kill a PT. Tubes, maybe. Input jacks, definitely.

Anyway, you got a great deal if you can figure it out. I have an HRD that I revived, hardened and modded. It's a great workhorse amp.

[Phil_S]

FWIW, I agree, it is unlikely all the secondaries went south. Disconnect the PT and see what it gives you without any load. IMO $100 was a bargain. The cab alone is worth that.

Think about stripping that POS and putting a "real" amp in there. You have all the basic parts. It actually wouldn't take much.

If you want to rebuild it, this is worth reading...not exactly the same amp, but close enough. Mikey is here in Baltimore. Curiously, we've talked on the phone and exchanged email, but never actually met. Nice fella.
http://deluxereverb.waynereno.com/index.html

[selloutrr]

most likely the board was hot and when it took a dive it rattles some solder off of a contact. The quickest thing would be to confirm the power goes in and out of the PT and then resolder the entire board.

Confirm tubes didn't go bad from the fall as well.

[Prairie Dawg]

I woulda bought that in a minute. It's likely going to be an inexpensive fix for an amp with a street value of $300 or more.

[galtjunk]

There is no voltage at the heaters, so no power light.

There is no dc anywhere on the board.
The power switch and the standby switch both work. The standby switch doesn't do anything because there is no voltage getting to it.

There is 120v ac at the fuse, power switch and the spade lugs feeding the white and black wires to the power transformer.

I removed the Red, brown and green leads coming from the pt to the main board and tested these for ac voltage. Nothing anywhere.

I'm guessing that either the white or black lead feeding the pt is bad or the pt itself is bad.

I will pull the pt and see if that is the problem.

Thanks for your suggestions.

[martin manning]

The transformer might have some kind of thermal limiter in it... could that be failed open?

[Teleguy61]

HRDxs are notorious for cold solder joints.

[DonMoose]

The transformer might have some kind of thermal limiter in it... could that be failed open?

Certainly could - and those are one-shot deals, too - no self-reset (safety, y'know). If the thermal fuse goes it's assumed conditions inside the tranny were bad enough to compromise the insulation in the windings.

[DonMoose]

I removed the Red, brown and green leads coming from the pt to the main board and tested these for ac voltage. Nothing anywhere.

I'm guessing that either the white or black lead feeding the pt is bad or the pt itself is bad.

I will pull the pt and see if that is the problem.

Thanks for your suggestions.

Look for reasonable ohmage across the primar(y|ies) and HT secondaries - the thermal fuse Mr Manning mentioned would open up one of those.

[galtjunk]

I pulled the pt.

There is no reading at all between the primaries.

There are 44 ohms across the hv.

There are 0 ohms across the heaters

There are 4.5 ohms across the bias.

I pulled the cover and I don't see anything unusual.

I don't see any kind of thermal device.

[selloutrr]

can you set up a test jig out side of the amplifier and put power to the PT. If it's dead it's dead if not put it back and start touching up solder points.

[galtjunk]

I put 120v to the white and black and got nothing from the hv secondaries.
It's dead, I'll order a new one from CEDIST for $39 I'll have something I can let my grandchildren play with.

Just out of curiosity I'll pull it completely apart and see what happened.

Thanks again.

[billyz]

If the Transformer is fused internally you will need to pull back the outer winding cover to see the fuse. If there is a copper band around the coils it will need to come off as well, or at least unsoldered and peeled back. Since it is dead what have you got to loose by looking ?
I am not talking about the end bells either.

[galtjunk]

I took the bells off and removed the copper tape.
I got down to where the leads were soldered to the internal wiring.
Everything seems to good up to that point.
I did not see anything like a fuse.

I ordered a new pt this morning so I'll just replace it.

Thanks,