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Search: Posts Made By: redwire
Forum: General Electronics Technical Discussion Yesterday, 08:08 PM
Replies: 16
Views: 259
Posted By redwire
Re: Pinout of TV antenna cable

When I worked at an electronics distibutor, there was always odds and ends of the wrong cable someone had ordered, sitting in reels collecting dust.
There was cheapo customers that didn't care- "4...
Forum: General Electronics Technical Discussion Yesterday, 01:59 PM
Replies: 16
Views: 259
Posted By redwire
Re: Pinout of TV antenna cable

Maybe it's old BT Telephone Cable. What does rural telephone cable look like in the UK? I could find modern cable (https://www.elandcables.com/cables/cw1128-external-telephone-cable) as a "single...
Forum: General Electronics Technical Discussion 10-01-2022, 08:43 PM
Replies: 16
Views: 259
Posted By redwire
Re: Pinout of TV antenna cable

Antenna rotators I worked with had a reversible AC motor, brake solenoid, and potentiometer for position feedback. So a few conductors required 3-5 flat 20awg outdoor ribbon cable was commonplace....
Forum: General Electronics Technical Discussion 10-01-2022, 02:16 PM
Replies: 118
Views: 1,229
Posted By redwire
Re: 12v 1uo941243c Relay repairable?

First you would troubleshoot and fix the blowing fuses problem, why are you now suspecting the relays? Look for the short circuits instead of wasting time here.
Forum: General Electronics Technical Discussion 09-30-2022, 09:15 PM
Replies: 16
Views: 259
Posted By redwire
Re: Pinout of TV antenna cable

It's got the the fat insulation on the conductors, solid wire- I've seen on some outdoor 300Ω cables.
Did they even use rotators in the UK? I've never seen it here for TV, only ham use. Satellite...
Forum: General Electronics Technical Discussion 09-30-2022, 04:18 PM
Replies: 16
Views: 259
Posted By redwire
Re: Pinout of TV antenna cable

They might be balanced pairs, like 300Ω twin-lead but I'm not sure what the UK used for antenna feed-ins. One pair for one antenna i.e. VHF, the other for UHF.
There should be a balun or two on the...
Forum: General Electronics Technical Discussion 09-27-2022, 08:48 PM
Replies: 25
Views: 511
Posted By redwire
Re: A Cautionary Tale - Alli Express

That screen cap shows the "color" is not selected, it's not highlighted. Once you click there, then the pic changes to show what you've ordered and highlighted window around the "color", as in this...
Forum: General Electronics Technical Discussion 09-27-2022, 01:09 PM
Replies: 25
Views: 511
Posted By redwire
Re: A Cautionary Tale - Alli Express

It's the market place - vendors pick up stuff from other vendors and resell. chinese stores will sell anything, they don't stick to any category. Pantyhose, LED's, IC's lol.

At least it appears...
Forum: General Electronics Technical Discussion 09-27-2022, 12:57 PM
Replies: 118
Views: 1,229
Posted By redwire
Re: 12v 1uo941243c Relay repairable?

I think this car is totalled?
Forum: General Electronics Technical Discussion 09-26-2022, 02:40 PM
Replies: 25
Views: 511
Posted By redwire
Re: A Cautionary Tale - Alli Express

Only 2 reviews... seems dodgy.
The store (https://www.aliexpress.com/item/1005004561839883.html) is silly, with headers it's double the price of just the 2040 board.

OP can you get a refund or...
Forum: General Capacitor Questions & Issues 09-26-2022, 11:14 AM
Replies: 17
Views: 317
Posted By redwire
Re: Audio rated caps - is it ok to use ‘audio’ rated caps on a non audio device

"Audio" caps are a rip off, 85°C rated and short life in the 1,000hr league. But they have silk inside lol.

OP it's for automotive use, under the hood? Get AEC-Q100 etc. certified parts and...
Forum: General Electronics Technical Discussion 09-26-2022, 10:55 AM
Replies: 25
Views: 511
Posted By redwire
Re: A Cautionary Tale - Alli Express

That sucks, I hate waiting many weeks only to get something silly.
I try to avoid stores around 95% or less feedback on Ali, they seem to be idiots or scammers. I couldn't find the "G-Tank store",...
Forum: General Electronics Technical Discussion 09-23-2022, 01:02 PM
Replies: 118
Views: 1,229
Posted By redwire
Re: 12v 1uo941243c Relay repairable?

OP doesn't give us the clear pictures, car year or wiring diagram or symptoms :banghead: it's impossible to really help him :banghead:
The diode trace has a run that goes nowhere... then I realized...
Forum: Troubleshooting Audio Equipment 09-22-2022, 07:58 PM
Replies: 22
Views: 381
Posted By redwire
Re: Car Audio Delco identification and restoration / repair

The two-pin connector P201, schematic shows one wire is BATT, other is Park Lights. So the unit will not power up unless you have power to BATT (as well as IGN and RCVR).
The 12-pin connector also...
Forum: General Electronics Technical Discussion 09-22-2022, 07:44 PM
Replies: 118
Views: 1,229
Posted By redwire
Re: 12v 1uo941243c Relay repairable?

Yes, inside the relay the track looks to have melted. I would say it was overloaded- which melts the PCB trace and pops the diode.
I would say a new relay or fixing this one and it will just melt...
Forum: General Electronics Technical Discussion 09-22-2022, 06:25 PM
Replies: 118
Views: 1,229
Posted By redwire
Re: 12v 1uo941243c Relay repairable?

You know I'm saying the copper track has melted :poof:
There is a problem with the car. It will just blow the relay once you repair it.
OK the resistor first stripe is brown then for 180Ω, and they...
Forum: General Electronics Technical Discussion 09-22-2022, 05:56 PM
Replies: 118
Views: 1,229
Posted By redwire
Re: 12v 1uo941243c Relay repairable?

Oh, I see the PC board trace is melted and lifted up, it must have fused due to a short circuit in the car somewhere. It might have also blown a 1N4004 diode.
The resistors are not a problem, I see...
Forum: Troubleshooting Audio Equipment 09-21-2022, 05:36 PM
Replies: 22
Views: 381
Posted By redwire
Re: Car Audio Delco identification and restoration / repair

I found some info here https://pcbisolation.com/blog/repairing-and-adding-bluetooth-to-a-90s-delco-radio/
Forum: Troubleshooting Audio Equipment 09-21-2022, 05:23 PM
Replies: 3
Views: 146
Posted By redwire
Re: Transformer Whine: Can it be rebuilt? Mirage S8 Subwoofer

I would first check if it's a power quality problem - high mains voltage causes transformers to vibrate more, and high THD causes the higher harmonics to get heard as the louder buzzing. At...
Forum: General Electronics Technical Discussion 09-16-2022, 12:35 PM
Replies: 26
Views: 455
Posted By redwire
Re: Wind generator charger schematics (or load of baloney ?)

The circuit is a "2N3055 joule thief" which is very common in the "free energy" crowd. Basically, just a primitive one transistor boost-converter.
To sell a fake generator, it's common to show more...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 09-14-2022, 01:57 PM
Replies: 4
Views: 151
Posted By redwire
Re: Computime CANh011 Kitchen Oven controller burnt resistor what value?

CANH011 oven timer board same as Candy/Lamona/Rosieres/Zerowatt/Hoover 42819496, 42837731.
In other board pics on the web, it looks like 100Ω at 2-3W flameproof, fusible. There are 15mmx5mm 3W like...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 09-13-2022, 07:22 PM
Replies: 18
Views: 836
Posted By redwire
Re: Blomberg electric dryer - Need a replacement relay

If the heater relay transistors are independent, then it's either the switch circuit for the relay coil or the MCU is refusing to turn on high heat.
Have you checked the heater temp sensor? 19.5kΩ...
Forum: Troubleshooting Power Supplies and Power Supply Design 09-12-2022, 11:02 PM
Replies: 48
Views: 4,109
Posted By redwire
Re: I need a charger schematic YLT6722000

Unknown manufacturer. I would consider AOTF18N65 (http://www.aosmd.com/pdfs/datasheet/AOTF18N65.pdf)
Harder to find TO-220F. I can't see why it's 18A, this power supply doesn't even come close to...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 09-11-2022, 06:19 PM
Replies: 18
Views: 836
Posted By redwire
Re: Blomberg electric dryer - Need a replacement relay

RLY5 driver transistor Q32 would be the same type as Q31. I can't see if the Q32 base leading from R109 goes to Q31 or anything (some safety interlocks etc) other than right to the MCU, pic is too...
Forum: General Electronics Technical Discussion 09-10-2022, 11:37 PM
Replies: 4
Views: 303
Posted By redwire
Re: How low can germanium voltage drop be acceptable?

The datasheet says VBE 120-150mV at 5mA and because your multimeter diode-test current is probably 1mA, you would get an even lower reading i.e. 100mV
Showing results 1 to 25 of 500

 
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