Rustiest ST70 Chassis of All-Time??

[Shannon Parks]

I did some "horse tradin'" a few weeks back with a guy from Florida. I swapped for a beat up ST70 chassis for testing purposes. Anyhow, I opened the box to see this thing, along with a note stating in a mocking scrawl, "Be careful when tradin' with Florida boys!!". By the time I thought 'you gotta be kidding me', I discovered the real chassis was underneath, along with some other goodies. :) Here's a shout out to Mike from Florida!

Supposedly it was rescued from a gator poacher in the Everglades. For what its worth, I swear I will make this chassis sing again. Yellow_Light_Colorz_PDT_08

[TerrySmith]

Hey Shannon,

That coupling cap on the upper right appears to be cracked, I'd replace it before powering it up! Yellow_Light_Colorz_PDT_04 Yellow_Light_Colorz_PDT_07 :o Yellow_Light_Colorz_PDT_16

[DuncanM]

I'd use a variac--whoops...no power cord--I guess you'll have to replace that first. Yellow_Light_Colorz_PDT_06

[Shannon Parks]

Whew! I hope my tetanus shot is current. I stripped that unit: took a powered wire wheel to it, naval jellied it and then wire wheeled it a second time. Man, what a mess. Anyhow, with all the new chassis options I'm thinking that these sub par ST70 chassis have hit a new low value-wise. Why not throw together a uber cheap 6V6 PP amp design using them? We'll see how far I get.

[TerrySmith]

Some black wrinkle paint would hide most pits etc. I found some at either Advance auto or O'Reillys auto parts. That stuff is getting hard to find! :o

[Shannon Parks]

Terry, I think I'm going to use silver Hammertone paint. I have a couple cans laying around. I'll paint the TF110 outputs (Triode Electronic's PP Fender clone) and a junkbox PT black - whatever is handy.

[s2kov]

How about antique copper finish similar to this?

[Shannon Parks]

I like that one. The silver micas are interesting! JAN, I wonder? Certainly gives one an ideas. Ultimately, I'm going to try and keep this one low dollar. May even reuse an original driver with stability mods.

Shannon

[s2kov]

that is the stock 390pF feedback capacitor that is inversely mounted on the driver board.

[dhuebert]

I'm kinda sorry you cleaned it up. Every car show I go these days features the latest trend: rat rods! How about rat amps?

Don

[EWBrown]

Ahhh, just sandblast it and cover it up with some woodgrain contact paper Yellow_Light_Colorz_PDT_05 Yellow_Light_Colorz_PDT_07 Yellow_Light_Colorz_PDT_09

If anything, it is going to weigh a bit less than an original chassis, by the time all that rust is removed...

[mesherm]

We have a salt fog chamber here at work. Send me the nice new trannies and after a week in the salt fog they will match that chassis.
We had a job to expose 8 very nice JBL 10" drivers in there once....all us Hifi guys were crying like babies when they came out. That and the time I had to crush 14 very expensive rifle scopes of different brands for Bushnell as part of an ad campaign.
Yellow_Light_Colorz_PDT_05

[EWBrown]

I wonder just how well that "Naval Jelly" (no, it's not made from belly buttons) would work on this one... Yellow_Light_Colorz_PDT_11

I've always wanted to do up an ST70 using 807s or the old style 6BG6GTs, I like the ST shaped tubes and plate caps. Or for less power and PP triodes, 2A3s, 6A3s, 6A5s or 6B4Gs.



/ed B in NH

[Shannon Parks]

I wonder just how well that "Naval Jelly" (no, it's not made from belly buttons) would work on this one... Yellow_Light_Colorz_PDT_11

Not worth a darn, actually. It would have required 26 applications and then nothing would have been left. :) I did get out some JB Weld and used some as pit filler, then filled in the bias pot holes, rca connector and the mono switch. Trying something a little different.

[TerrySmith]

I love JB weld! It has rescued me on many occasion! Yellow_Light_Colorz_PDT_09