Electronics Forum / Components / August 2008

I have a substantial number of RF transistors that have numbers M9665
and M9655. They are in trays and the trays are marked  PT4515. I can
only find a cross to the M9665. I you can help I would appreciate it. I
would be willing to give some transistors to the first person with ...

Can someone point me to a source for some Cherry "G: series keyboard
keyswitches?  All I can find at Cherry's site are their current MX1
series.
These are the older and bigger style keyswitches that were used in

I have a wireless Apple Mighty Mouse that has died, and I believe it is
only the LED that has stopped working, but I don't know what specs to
look for in a replacement, and if anyone can tell me what they would be,
or where I can find the exact part, I would appreciate it.

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I am looking for a source of type TM coax connectors and adapters.
Type TM is a miniature RF coax connector used way back in the sixties
on space programs. The connectors were originally manufactured by
General RF Fittings Division of Solitron Devices in Florida.

Gentlemen,
   We are looking for two IBM documents that are needed urgently for a
project. They are titled "4680 Store Systems Serial I/O Channel Attachment
Information" and "Serial I/O Product Attachment Information". $100 will be

I'm working on a Technics audio amp from the late 70's with blown outputs.
I've found one source (in Europe) for these transistors, but they're asking
$20 each for them and I am concerned about counterfeits.
They are 150V 10A 120W, with an f(T) of 50MHz... they are faster than

I'm looking for a waveform generator that outputs two sine waves of
the same frequency with 90 degree phase difference (sine and cosine).
I need a variable frequency between 0.05 Hz and 10 Hz.  Is there a
design that uses a single potentiometer or perhaps is voltage

Ok, Thanks for reading my post.
I have a Taylor 68 A/M RF and AF sig gen (valve) off eBay, cheap.
Low volume on AF and low output RF signal. Tracked it down to the volume pot obviously.
100k lin with 2 pole switch on/off on the back. Gone to 380k with most of the track gone.

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Hope you guys all have a great day and I will look forward to helping
you on all your RF needs

As I'm currently building a 12v, 2.1A power supply for an lcd monitor,
a question has arisen.
What component(s) would be necessary in converting a class 2 AC
adapter (of the correct voltage and amperage) to a functional power

Looking for a sensor that will tell me when ferous metal passes within an
inch or so and causes a beep or turns on light or vibrator.  Anyone know of
anything
like that?

Just curious, ran into this a few times: Is there a JFET in the J310
price category with a forward transfer admittance in excess of 30mmhos?
Doesn't matter whether N or P.
The BF862 fits the bill very nicely at 45mmhos but it costs around 15c,

I just bought a 4GB MicroSDHC card from buy.com
The buy.com Website had a picture with the DANE-ELEC logo, and "CLASS
4" on the card (4MB/sec ?)
I thought it was a good deal for $10.95 (after a $16 rebate).

I have a coin op arcade game called Cyber Cycles by Namco.  It is a
twin motorcycles game. to determine if the motorcycle is turning left
or right it uses a pot.  This pot is a 40 Degree 1k potentiometer.  I
think this has to do with the fact the the motorcycles can only tilt