Random 250 question.

[Cabover Bob]

Gamma-ray graphics.

Gamma-ray Graphics - Custom Cb Radio Faceplate Stickers Decals Skins

Gamma-Ray Graphics Custom CB Radio Faceplate Stickers Decals Skins. Custom Graphics for your Mobile or Base CB Radios. gammaraygraphics.net

www.gammaraygraphics.com

I just got a great custom face plate decal from them for a friends SB-220.

73
David

I've dealt with them before, I'll reach out.

 

[Cabover Bob]

Update - finally got around to final reassembly of this thing......

- new heat sink cut to size, holes drilled, tapped n deburred, component side surfaced with machinist whet stone, heat transfer compound cleaned off of transistors and then mounted.

- heatsink was about 1/2" too narrow, so I filled the gap at the cover screws with plastic spacers.......I sure hope this sucker works......

Todd

 

[USXDriver]

Update - finally got around to final reassembly of this thing......

- new heat sink cut to size, holes drilled, tapped n deburred, component side surfaced with machinist whet stone, heat transfer compound cleaned off of transistors and then mounted.

- heatsink was about 1/2" too narrow, so I filled the gap at the cover screws with plastic spacers.......I sure hope this sucker works......

Todd

Well? Not being an ass but why not test it before restoring it?

 

[Cabover Bob]

Well? Not being an ass but why not test it before restoring it?

Considering that I have <$35 and a few hours of my time invested, it was worth the gamble, personal choice I guess.......

 

[kc8mob]

Hopefully you used some more bird sh!t after cleaning off the old and remounting them!

FWIW nothing appeared obviously burnt including the Base "Smoke" resistors.

However over driving the piss out of the little motorolas just causes them to go open, not short.

So here's to ya Blacksmith!

 

[groundwire]

It used to say 250 plus on the front , worn off through the years.
My brother has the TNT Super Mod with 2 MRF 455's in it View attachment 56674
Hook it up, see if it works.
View attachment 56675
Here is the 600 plus.
And the one KW
I had a high school friend that had the TNT 12 pack, all MRF 492 transistors in it that was a monster.




View attachment 56676

I have always had a soft spot for tnt amps (nostalgia sake). When i was a young kid in hawaii around 1979, the first amp i saw was the tnt 12 pack. Its was on the floor of a guys little Nissan truck, filled up the whole floor. He was using a president jackson and talking skip on the mini bowl ch11. Everyone was calling his name. I was so excited to watch that. Lol,

 

[Cabover Bob]

Hopefully you used some more bird sh!t after cleaning off the old and remounting them!

FWIW nothing appeared obviously burnt including the Base "Smoke" resistors.

However over driving the piss out of the little motorolas just causes them to go open, not short.

So here's to ya Blacksmith!

Forgot that I had to buy a tube of bird shit, so I guess I have around $40 invested........supposed to really put that stuff on super thick right ?

Todd

 

[AudioShockwav]

invested........supposed to really put that stuff on super thick right ?

No. A thin layer is best, you want all the metal to metal contact you can get, heat sink compound just fills the small imperfections so you don't want a big glob of it under them.

73
Jeff

 

[Cabover Bob]

No. A thin layer is best, you want all the metal to metal contact you can get, heat sink compound just fills the small imperfections so you don't want a big glob of it under them.

73
Jeff

Sorry for my sarcasm, just like to have a laugh, I did apply very thin. The tube must have sat for a few years, had to squeeze some separated stuff out before getting into the good.

Todd