Getting back into radio..out for 30+ years. A old Ham Friend offered me a older Contex 150 from Biggs Electronics. Had to get into his attic to find it,in all the dirt and cobwebs.. its pretty ruff and covered with dirt and grime! Is it worth saving..was it any good? Any/All info on this amp would be helpful! Thank You.
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Contex 150 amplifier?
- Thread starter Straightshooter58
- Start date
BJ radionut
Supporting Member and 6m addict
can I clean the inside if the amp with spray electrical contact cleaner..and can the tubes be cleaned also? Its very dirty and the guy that had it smoked for years!
BJ radionut
Supporting Member and 6m addict
Contact cleaners can have Toluene or similar type degreaser...They eat Plastic and are generally conductive.
Tubes I like denatured alcohol lightly applied with soft cloth. Care to not get around the tube base as there is Glue resin that hold them together.
For chassis I use a mild solution of Simple Green and low pressure from garden hose (remove tubes). I use a soft paint brush as a scrubber.
Then rinse, blow excess moisture away with 15-20 lbs. of compressed air and a small nozzle.
Then leave to dry warm sunny day...then inside for several days or week before ever putting power on it.
My 2 cents
All the Best
Gary
PS: Mild solution of Dawn and warm water and old white T-shirt rag works on smoke scum...same above rinse, blow dry leave it alone for week.
Also if transformer is not sealed(looks like paper around the windings) I cover those with a coffee can when cleaning and just ripe those down...Try not to get them soaking wet!
Tubes I like denatured alcohol lightly applied with soft cloth. Care to not get around the tube base as there is Glue resin that hold them together.
For chassis I use a mild solution of Simple Green and low pressure from garden hose (remove tubes). I use a soft paint brush as a scrubber.
Then rinse, blow excess moisture away with 15-20 lbs. of compressed air and a small nozzle.
Then leave to dry warm sunny day...then inside for several days or week before ever putting power on it.
My 2 cents
All the Best
Gary
PS: Mild solution of Dawn and warm water and old white T-shirt rag works on smoke scum...same above rinse, blow dry leave it alone for week.
Also if transformer is not sealed(looks like paper around the windings) I cover those with a coffee can when cleaning and just ripe those down...Try not to get them soaking wet!
I'll use your ideas on cleaning the amp. I did not realize that electrical contact cleaner ate plastic parts..and due to the age of the amp..I want to play it safe!
Once I get it cleaned up better than it is now.. I'll take it to a tech to have him check it over before I plug it in or anything into it! Thanks Again.Respects.David.
Once I get it cleaned up better than it is now.. I'll take it to a tech to have him check it over before I plug it in or anything into it! Thanks Again.Respects.David.