Hi Karin,
As with several Tek models, the 7A26 attenuator has polyphenylene oxide (PPO) boards. Aside from its low melting temp, it is sensitive to certain common solvents. I use isopropyl alcohol to clean attenuator contacts. It works well, it's cheaper than Deoxit, and is well tolerated by PCB materials. And it's even officially recommended by Tek.
-- Cheers,
Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
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On 2/26/2022 10:26, Karin Johnson wrote:
I am servicing a 7A26 and have a question about using DEOXIT D100 on the attenuator sping leaf contacts. In the 7A26 service manual there is a statement as follows:
"Do not apply any solvent containing ketones, esters,or halogenated hydrocarbons."
The MSDS safety sheet for D100 has a statement about the odor (ie:("Ehtereal / hydrocarbon odor").
Given the word "hydrocarbon odor" in the MSDS sheet, I am wondering if DEOXIT D100 is safe to use
on the circuit board containing the spring leaf switches????
Any suggestions????
Karin Anne Johnson
Palm Harbor, FL
