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eHam Forums => HomeBrew => Topic started by: TANAKASAN on March 06, 2008, 01:08:49 PM



Title: Variable Capacitor Pinout
Post by: TANAKASAN on March 06, 2008, 01:08:49 PM
I'm looking for the pinout for a variable capacitor, the sort used in cheap transistor radios. It's got a white base with transparent case and I can see at least two multiple-plate variable capacitors inside. There are also four trimmers on the back so this could be an AM/VHF model.

If I'm lucky there will be a standard pinout <g>.

Tanakasan


Title: Variable Capacitor Pinout
Post by: KL7AJ on March 06, 2008, 03:57:32 PM
Alas.....there IS, but I've FORGOTTEN IT. :(

If you look in the edge, you MIGHT be able to see a partition.  In any case, the oscillator section will have smaller (or fewer) plates.  The center pin is common...that much I know. :)

eric


Title: Variable Capacitor Pinout
Post by: VA7AAX on March 07, 2008, 02:34:01 PM
If i remember correctly, there are 3 leads sticking out,

Now if you hold it with the leads facing AWAY from you, the middle one is ground, the left lead would be 0-60pF, and the extreme right one would be 0-160pF.


73 de va7aax


Title: Variable Capacitor Pinout
Post by: TANAKASAN on March 08, 2008, 11:26:55 AM
Seven leads out of the case. I'll call them north, south east, west with the white face as the front and the clear face as the back. Why can't Eham have pictures?

North
One short lead from the back

East
One long lead from the back and one short

South
One short lead from the back

West
Two long leads from the back and one short lead from the front

It's my birthday in a few months and I'm hoping that someone will take pity on me and get me a capacitance meter.

Tanakasan


Title: Variable Capacitor Pinout
Post by: VA7AAX on March 10, 2008, 03:37:25 PM
If you are looking for a capacitance meter, go for the AADE meter kit(google it). I myself am going to get one.


Title: Variable Capacitor Pinout
Post by: AI4NS on March 17, 2008, 09:00:42 PM
I have the AADE meter, and it is awesome. Cheap and very effective. Makes working with small components easy, no need to read them, just measure. I had a bunch of variables and didn't know the range, the AADE meter worked, and now I know...