Good stuff, good work! A couple tips - to turn off the pass transistors, the base needs to be grounded rather than floating. Once the bases are grounded, a small load of maybe 1/4 A (56 ohms) at the output will enable an accurate reading of output voltage. The combination of floating bases and the 11M impedance of the meter alone made for a small, unrealistic voltage measurement.
@rayhill1855 Жыл бұрын
I really like how you cleaned the board.
@montygore2 жыл бұрын
I did not know you was a fellow ham. Ive been a ham since 1984. Another great video. 73 W5DN
@KoenOnbekend2 жыл бұрын
Happy new year! Great and informative video as always! I could be wrong but those new transistors look suspiciously like those fake Chinese ones with the large blue insulators, same print too. They seem to work at first but die quickly under load, the die is tiny in them.
@TheKuldeepsingh882 жыл бұрын
Happy new year to all of you
@norcal7152 жыл бұрын
Happy New Year!
@K1ZEK2 жыл бұрын
Happy New year to you and your family...Leo
@norcal7152 жыл бұрын
Happy new year!
@kahlid-ataya2 жыл бұрын
this video is a new year's gift 🎁 thanks for it
@norcal7152 жыл бұрын
Happy New Year!
@Sctronic2092 жыл бұрын
Enjoy your channel.
@barryg412 жыл бұрын
Happy new year to you Steve.
@norcal7152 жыл бұрын
New Year, Barry. I am leaving off the H-word until the year proves to better than 2020 or 2021
@marka19862 жыл бұрын
Somethings up with the original transistors. Never seen a standard to3 audio or pass transistor with that much hfe. Maybe 20 to 75.
@norcal7152 жыл бұрын
My thoughts exactly!
@MMWA-DAVE2 жыл бұрын
So, the million dollar question is - Are you the Dave on the business card? 😎
@norcal7152 жыл бұрын
No, That is Dave at Grants Pass TV Repair, Check you his channel kzbin.info
@MMWA-DAVE2 жыл бұрын
@@norcal715 Damn, I thought we were getting a face reveal 😁
@FulvioGa2 жыл бұрын
@@MMWA-DAVE you can watch him in a video on GrantsPassTVRepairs channel.
@MMWA-DAVE2 жыл бұрын
@@FulvioGa Thanks
@cajuncoinhunter2 жыл бұрын
@@MMWA-DAVE I have seen his face many times in his video's, him and and dave would pass for cousins though....
@cajuncoinhunter2 жыл бұрын
That's a good sized tube of compound, How much was that 35 to 40 bux ??/
@josealfredocuevas Жыл бұрын
Great job on the repair👍🏼 I have a question on a power supply you might be able to help me with. it's a pyramid PS-52KX and the problem is it's supposed to do around 50 amps but it's only doing 15 amps and when you have a load on it I'm running a CB radio the problem is when I key the microphone and the radio draws amps I get a loud hum from the power supply when I unkey the hum goes away and it only draws 15 amps the voltage is fine..
@stargazer7644 Жыл бұрын
A loud hum under load can be several things. See if it is mechanical - if the case or something inside is loose and vibrating. If nothing is vibrating, check the rectifiers.
@AB1Vampire2 жыл бұрын
Question: At 11.30 when you clean the PCB with brush, what fluid are you using? Thanks for posting your 2N3772 test results. I'm doing the same with my Pyramid PSU also using 3772's but a Peak-Atlas.
@norcal7152 жыл бұрын
I use regular Acetone available at any hardware store.
@AliAli-dr3th2 жыл бұрын
Hello Mr.norcal715 .. Thanks so much .I'm beginner technition.. how I follow up voltage in circuit board ...& also some capacitors..47uf..50v .. or 1000uf 16v .. when I tested should be get same voltage or different value... Thanks .. Ali ...khartoum.
@norcal7152 жыл бұрын
Its hard to tell, most capacitors in a power supply application will have approximately 60-80% of their rated value as far as voltage. But in different applications a 16v capacitor may only have a volt or two depending on what they are using it for. Try and find a schematic, it will be a great help.