Moderator: kabubi
philpath wrote:Is there an improvement in the sound after the electrolytic tune up?
joejet wrote:I envy guys like you qguy. I wish I had learned electronics like you had so i can tinker with my own stuff. I've always loved electronics but I never had the chance to learn even a bit.
Anyway, that's a pretty nice receiver you're working on. And you're doing really good on your restoration. Keep us posted Sir.
endrik35 wrote:Very nice resto qguy! I need to recap the filter caps of my muse amp. They're rated at 10,000 microfarads at 100v. Can you give me an advice on where to source this? I need a pair. Tia!
georgepogi69 wrote:nice job Q....bilib ako sa patience mo...i know your SX will sing for a long time...
qguy wrote:When it comes to this hobby, you dont need patiencegeorgepogi69 wrote:nice job Q....bilib ako sa patience mo...i know your SX will sing for a long time...
qguy wrote:Finally back on duty
qguy wrote:Cleaning output transistors....YIKES
At first I did not want to touch the output transistors for fear of screwing up, I asked around what is the benefit of cleaning / regreasing the transistors. Response was that for older units the thermal grease dries up and no longer conducts heat away from the transistor, resulting in over heating transistors when the amps is pushed too hard, basically you end up with a burnt out transistors. kinda like changing oil on an old car before racing it . Since I "race" my amp on occasions ;D I decided to go for it...
cleaned transistor and new insulation mica
Basically you remove the transistor, cleaned with tissue or clean rag. Apply THIN layer of NON CONDUCTIVE Thermal grease on both sides of the insulation mica and put the transistors, clean the pin and install....
I also regrease all those smaller three legged transistor
I used Unick thermal grease, 80 php at Watsons for a small size tube
This was one of the easiest process in the restoration.. a bit messy though as the grease sticks to everything, have a roll of tissue when you do this
mikeer2002ph wrote:
You may also want to consider the thermal compound meant for PC processors on your next 'maintenance' (shin-etsu G751 or Arctic Silver 5 [as5] - silver/silicone thermal compound) they have a higher heat conductivity index as compared to the normal silicone thermal and it stays 'wet' - doesnt dry up like the raon variants which requires cleanout/reapplication every year or 2.
Caveat with AS5 or shin-etsu G751 is you only apply a very very thin layer, it's also more expensive than your raon thermal compound variants but more than compensates the price with better 'tracking' of the bias transistor/thermal diode since heat isnt being kept 'long' on the transistor package
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