Electronics Repair

sub a KA3842 with a TL3842 ?

got a monitor chassis with a bad ka3842. i have a tl3842, but am not well versed enough to compare via datasheets. can i...

1 comments posted 7yrs

posted by mhooker32

1 comments posted 7yrs posted by mhooker32

Antique Radio with Electromagnet on speaker

I got an old 1930s Crosley AM radio. It needs to be recapped and a few other things, such as a dial string and new powe...

17 comments posted 7yrs

posted by tubeguy

17 comments posted 7yrs posted by tubeguy

Hybrid IC questions

I have a CNC machine with a FANUC control. The control uses what the web calls "hybrid ICs". It looks like these device...

18 comments posted 7yrs

posted by etpm

18 comments posted 7yrs posted by etpm

OT Extracting code from chips, deompiling

OT Extracting code from chips, deompiling What is the current status of things. 1) Primarily, if a chip has computer co...

11 comments posted 7yrs

posted by NONONOmisc07

11 comments posted 7yrs posted by NONONOmisc07

Source for quality tiny torx screwdriver bits?

I'd like to get a set of tiny torx screwdriver bits...T9 and smaller for disassembling tiny electronic gizmos. I'm look...

24 comments posted 7yrs

posted by ham789

24 comments posted 7yrs posted by ham789

vision enhancement for close work

I've just entered the "post cataract surgery" world. Results were good for distance vision. I can't bring anything clos...

22 comments posted 7yrs

posted by timothy42b

22 comments posted 7yrs posted by timothy42b

compteur

En amont, c'est collectif, en aval c'est privatif, mais pour ce qui est du compteur ? Je suis en collectif. Merci

15 comments posted 7yrs

posted by look165

15 comments posted 7yrs posted by look165

Home LED Flickers

I got a 60W Equliv. LED bulb in a fixture that flickers all the time. Its not very old. It does produce enough light bu...

50 comments posted 7yrs

posted by tubeguy

50 comments posted 7yrs posted by tubeguy

Anyone ever restuffed bumble bee caps?

I was watching some youtube videos for restuffing electrolytics and wax paper caps. I see no reason to do the wax paper...

3 comments posted 7yrs

posted by tubeguy

3 comments posted 7yrs posted by tubeguy

Odd wiring in tube ampmschematics

I would post this in the basics group but it seems like there are more responders here. Anyway, I have been looking at...

36 comments posted 7yrs

posted by etpm

36 comments posted 7yrs posted by etpm

Type of wire to use for shielded test lead....

I am restoring a Eico VTVM model 221. The DC requires a test lead with shielded wire and a 15M resistor in the probe. I...

10 comments posted 7yrs

posted by tubeguy

10 comments posted 7yrs posted by tubeguy

Fine pitch trace repair

Due to an unfortuante jab with the head of a screwdriver it looks like I have at least one, possibly two broken traces...

25 comments posted 7yrs

posted by user

25 comments posted 7yrs posted by user

Hooray! Fixed!

I live on an island and it is hard to get CNC repair people out to look at the machines. So I fix 'em myself. The Miyan...

11 comments posted 7yrs

posted by etpm

11 comments posted 7yrs posted by etpm

Solved -- Nook Simple Touch screen not working

Everything worked, but the screen was unresponsive. For once, I googled before asking. The problem is crud between the...

7 comments posted 7yrs

posted by bashley101

7 comments posted 7yrs posted by bashley101

How do you test a Selenium Rectifier?

How do you test a Selenium Rectifier? Yes, I am aware that they should be replaced, but on preliminary tests of this 19...

27 comments posted 7yrs

posted by tubeguy

27 comments posted 7yrs posted by tubeguy