Electronics Repair

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BT139F triac dimmer circuit

I have one of those tall halogen lamps with the internal dimmer knob. It quit working... Opened up and removed the slen...
2 comments posted 18yrs
posted by pschuman_no_spam_me
2 comments posted 18yrs posted by pschuman_no_spam_me

HP CRT filament question

I have an HP 8568B spectrum analyzer which went through shipping recently. The display unit no longer works and it appe...
4 comments posted 18yrs
posted by dodger741
4 comments posted 18yrs posted by dodger741

Vox AC30 , AC30CC2X, 2005

Roadie dropped it off the stage , in flight case, worked fine for another gig and then next time worked for 3 seconds....
10 comments posted 18yrs
posted by diverse
10 comments posted 18yrs posted by diverse

telephone, push 'pad' repair; electrolyte?

I am repairing a Panasonic wireless phone. It has a molded silicon push pad which contains all the phone's buttons. Beh...
1 comments posted 18yrs
posted by drubnone
1 comments posted 18yrs posted by drubnone

recap, 70's sansui; cap specifications

Cap 'type/series' information needed. I'm replacing the larger electrolytic caps on the last amp and power supply. I ha...
1 comments posted 18yrs
posted by drubnone
1 comments posted 18yrs posted by drubnone

Hybrid IC119-2369-01 for Tek 1502C TDR Wanted

Somebady know where buy this hybrid IC for TEK 1502C TDR? Also used? Or somebady know how test the integrity? Regards, M...
0 comments posted 18yrs
posted by ciulandro
0 comments posted 18yrs posted by ciulandro

Identify these parts?

Hi, I have 2 parts in a SMPS that I think are PTC thermistors. One is marked KC103P, the other KC221K, the first a blue...
10 comments posted 18yrs
posted by sound.service
10 comments posted 18yrs posted by sound.service

GFCI trips on a separate circuit

Sometimes my microwave trips the other circuit that has our computers on it, even though the appliance is on a differen...
8 comments posted 18yrs
posted by kolwicz
8 comments posted 18yrs posted by kolwicz

Availability of Japanese fluorescent lamps in America

Hi, I need an FSL-520-D Japanese style fluorescent lamp. It is unlike an American style lamp in that it only has one el...
15 comments posted 18yrs
posted by Major_Debacle
15 comments posted 18yrs posted by Major_Debacle

Soundcraftsmen 700D

Need a schematic. Yeh I can buy one but what fun is that? I had to replace one banana jack in the back and noticed a gr...
1 comments posted 18yrs
posted by meat
1 comments posted 18yrs posted by meat

LA1247 AM receiver IC problem

Radio working and then put away , stored indoors for some years. Now only strong AM signals come through with a decent...
4 comments posted 18yrs
posted by diverse
4 comments posted 18yrs posted by diverse

Anyone familiar with coil winding machines ?

My coil winder is from the 1920s and no manual and when I picked it up in a very sorry state, it was minus the tensioni...
21 comments posted 18yrs
posted by diverse
21 comments posted 18yrs posted by diverse

Sharp NoteVision Ballast BQC-XGC50X//1

I have one of the above Projection TV/Computer units and was wondering where I could locate a schematic for the Ballast...
0 comments posted 18yrs
posted by sarason_not_me
0 comments posted 18yrs posted by sarason_not_me

IBM desktop PC can not boot from CD

I'm working on a pal's IBM PII computer which was extremely slow so I tried to format it but now I cannot boot from CD...
11 comments posted 18yrs
posted by fynnashba
11 comments posted 18yrs posted by fynnashba