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A word of caution
Unless you do have access to very high power resistors it will end up in smoke. Think about it .. 13.8 volts 40 amps that's 552 watts ! That's the power of small electric heater baseboard. You need a 1000W resistor or so to make such a test. Using lower power rating...
Impedance / bandpass
Many devices offer low output impedance compared to the load.This is simply to allow for ex a mic to be able to be split to the FOH console and the monitor console without degradation in performance. We often see 200 ohm rated outputs on preamps / digital signal...
at least really close
The schematic for the 422A is truly really close to what i got under my eyes.
chip nummers vary but i need to check the change between a 7130 and a 7131 but i believe it's close enough to allow me to get the job done.
At least layout is truly really similar.
It's...
Sam's
Well i see this listed ..
TRC-421 (21-1536)..................273
Wonder how different the 421 and 421A are
Anyone's got the 421 then ?
ps got the full lc7131 Sanyo data sheet. I checked it's operation earlier on , the chip seems to react correctly , i see the keying ...
On the LC7131 that was the first part i had suspected and since i had two new ones in stock , just changed it for the heck of it no go .. ill come back to the thread every now and then see if anyone found anything about this mystery radio :)
Thanks guys :)
Chassis
the chassis type is a p-200979
tells us nothing on google and yahoo etc ..
And no Sams does not have anything on it . Before i came here i had already exhausted the list of obvious places , including the Radio Shack website and sent them a message asking for it only to be told they...
Hello
Trying to find a schematic/service manual for a Realistic TRC-421A which
seems to be a bit hard to get. The RS web site does NOT have a schematic for it and my searches have not turned out anything up to now.
If anyone knows where one is hiding or have a copy i would really...
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