Variable cap identification

[KneeBiter]

Anyone know the value of this cap? Can't find anything searching the number. It's a very old modification in a pal vfo I came across to switch in lower frequencies. Would like to mod another one this way.

 

[DoctorAudio]

It's a "46" style cap. Looking at the zoomed in pic it looks like it only has one mica layer so it's value is very low. It's probably like 5-30pf or 10-50pf, something like that.

 

[999]

Is there a marking on the other side?

 

[KneeBiter]

Is there a marking on the other side?

Nope. Only marking is that in pic.

 

[KneeBiter]

It's a "46" style cap. Looking at the zoomed in pic it looks like it only has one mica layer so it's value is very low. It's probably like 5-30pf or 10-50pf, something like that.

I'll try both those values and see how it works. Thanks

 

[nomadradio]

The number on the side of the part is a so-called "house" number. This is what would appear in a factory service manual. If you order enough of a standard part, they'll print whatever number you want on the part, not necessarily the catalog number from the manufacturer of the part.

That's my guess, under 100 pf for sure. Probably under 50.

There's nothing magic about the physical form of this variable cap. A smaller, easier-to-get trimmer cap should work as well.

73

 

[KneeBiter]

Thank you.

 

[Wire Weasel]

If you get into doing a lot of work, you can always get a Capacitance Meter, commonly found as LCR Meters. They are common and don't cost too much.