Electronics Repair

Panasonic DVD Recorder model DMR-ES20 Problem

Hi, I have a Panasonic DVD recorder, model DMR-ES20, issue. When you plug it in (AC outlet), the rolling "ooooooo" (ini...

3 comments posted 7yrs

posted by jaugustine

3 comments posted 7yrs posted by jaugustine

Why were old transformers coated with tar?

I remember a lot of old transformers, particularly the power transformers on the old TV sets, were coated with tar. It...

11 comments posted 7yrs

posted by tubeguy

11 comments posted 7yrs posted by tubeguy

1936 Hoover Junior 375

I've done the 1940s ones, fairly straightforward. Roller brush bearing clea nout & oil, thorought electrical safety che...

12 comments posted 7yrs

posted by tabbypurr

12 comments posted 7yrs posted by tabbypurr

Making an Adaptor from the vintage single wire 5/8" screw on MIC connector to BNC

Most of my vintage testers have those old style 5/8" screw on MIC connectors. I have considered changing all of them to...

14 comments posted 7yrs

posted by tubeguy

14 comments posted 7yrs posted by tubeguy

What differentiates good audio xmfrs from bad ones?

I see really expensive audio output and power transformers for sale as well as cheap ones. And lots of folks really wan...

22 comments posted 7yrs

posted by etpm

22 comments posted 7yrs posted by etpm

Panasonic cross reference

Hi Group, I'm working a Panasonic TC-P50S2. The tv won't power up and no le d blinking codes, I found a surface mounted...

2 comments posted 7yrs

posted by stankowalski02

2 comments posted 7yrs posted by stankowalski02

Using a Signal Generator for an "In Home" radio transmitter

Is it possible to use a Signal Generator for an "In Home" radio transmitter? I would like to make a small in the house...

42 comments posted 7yrs

posted by tubeguy

42 comments posted 7yrs posted by tubeguy

Vintage TV repair test equipment

Over the years I have acquired a lot of vintage test equipment. I still use most of it, but I have the following, which...

2 comments posted 7yrs

posted by tubeguy

2 comments posted 7yrs posted by tubeguy

Calibrated dial knob repair

I recently bought an old Eico 955 In circuit capacitor tester. It worked right away, but I am going to recap it. But th...

16 comments posted 7yrs

posted by tubeguy

16 comments posted 7yrs posted by tubeguy

Tektronik 2230 oscilloscope: nasty menu?

When I turn it on it says "power up failure, press menu key to continue". I press the 3 keys of MEMORY DISPLAY ON/OFF p...

7 comments posted 7yrs

posted by coulon

7 comments posted 7yrs posted by coulon

2018 is done and dusted

Happy New Year everyone

0 comments posted 7yrs

posted by dave

0 comments posted 7yrs posted by dave

kitchenaid range control transformer o/p voltage?

Please i am looking for the output voltage of the control power transformer for this model of Kitchenaid free standing...

0 comments posted 7yrs

posted by fynnashba

0 comments posted 7yrs posted by fynnashba

Ooma tells me speed & jitter are ok but I have 0.25% packet loss on WISP

Ooma tells me speed & jitter are ok but I have 0.25% packet loss. What happens, as a result, is that in any given phone...

7 comments posted 7yrs

posted by arlen

7 comments posted 7yrs posted by arlen

Whats the difference between Magnetic & Crystal headphones?

Whats the difference between Magnetic & Crystal headphones? I have an old tube tester which has a jack labeled "NOISE"...

7 comments posted 7yrs

posted by tubeguy

7 comments posted 7yrs posted by tubeguy

[OT] Calibrating an auto level?

This is purely mechanical surveyor's level, for levelling only, absolutely no electronics. A tiny mirror or prism , on...

10 comments posted 7yrs

posted by diverse

10 comments posted 7yrs posted by diverse