[Hallicrafters] Cleaning the inside of HT33A amplifier

[WA1KBQ at aol.com]

You might be quite surprised to discover how well that nicotine  has 
preserved everything. It will be quicker in the long run and yield  better results 
if you disassemble the unit, wash everything and blow dry  including the 
chassis. I would probably remove the transformers and chokes and  clean them 
separately but you could always try covering them with plastic bags/  rubber 
bands around the bottom and be careful. Richard is right on about the  oven; 
I installed one in my shop and use it a lot, even after blowing parts dry  
they often go into the oven for a few minutes to be sure there are  residual 
traces of moisture left behind (for example: between two flanges  of 
spotwelded sheetmetal). Outside on a table on good hot sunny day  will work also.
 
Regards, Greg
 
 
 
In a message dated 11/8/2011 8:37:47 A.M. Eastern Standard Time,  
k5pgw at yahoo.com writes:

Has  anyone thoroughly cleaned the inside (chassis and components and 
transformers)  of a Hallicrafters HT 33A amplifier. My acquisition seems to be a 
good one  electrically, but the inside is totally coated with tar and 
nicotine. I have  NEVER seen a piece of electronic gear turned completely GOLD 
inside by tar and  nicotine.

There iare also years of dust and dirty GRIME on the chassis.  Looks 
AWFUL!!!

I am using Go Jo which doesn' t really introduce as much  moisture as plain 
water and soap although I do have to get the Go Jo off what  ever I put it 
on. The cabinet and outside of the chassis and enclosure around  amp inside 
the cabinet are looking good. It is just the amp chassis and  components 
that re the challenge.

I am mainly worried about the  transformers because they are NOT POTTED.

BELIEVE IT OR NOT    but the underside of the chassis and blower fan are 
GOLD also. Apparently, the  fan drew the cigarette/cigar smoke into the 
cabinet and deposited it above and  below the chassis where it adhered to 
everything.

Your personal  experience cleaning inside the HT 33A chassis will be 
greatly appreciated.  Thanks and 73, John,  K5PGW
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