in search of coil values

Posted: 5/12/2008 2:46:00 PM
mattharrison

Joined: 4/6/2008

I am considering building a paia theremax theremin from scratch and am in search of the values of the coils for this particular theremin. i have read the schematic but there is no value given, i am aware that these coils must be tuned and therefore have a range of values. with that being said if anyone could give me the range value for coils L1 to L4 that must be used for this theremin model it would be greatly appreciated. i am aware that paia sells kits for this model, the reason i have chose the DIY route is because i feel i could learn more from building it myself, i feel that i have a decent electronics knowledge that will give me the ability to build the theremax myself. thanks in advance.
Posted: 5/13/2008 1:31:50 AM
Thierry

From: Colmar, France

Joined: 12/31/2007

These are TOKO 796 kHz IF cans.
Posted: 5/14/2008 1:04:46 AM
mattharrison

Joined: 4/6/2008

thanks for that thierry, if you don't mind me asking how do you know this, have you built one yourself?
Posted: 5/14/2008 1:23:47 AM
mattharrison

Joined: 4/6/2008

one more thing, do you know the actual inductance range or the turns ratio for these coils.
Posted: 5/14/2008 2:39:41 AM
Thierry

From: Colmar, France

Joined: 12/31/2007

No, I decided to get an Etherwave standard in the time. But I took this decision only after studying lots of theremin schematics and manuals online.

And so I remember that the coils in the Theremax were 42 IF 110 types which existed from several manufacturers. Here are the specifications:

Center frequency: 796KHz
Q value: 80 min.
Inductance: 360µH±6%
Turns: 1~2(105), 2~3(2), 4~6(3)

1~3 pins are primary
2 is primary cursor
4~6 is secondary

This can be found here: http://www.mouser.com/catalog/specsheets/114215.pdf

Hope this helps.
Posted: 5/22/2008 3:17:30 AM
Thierry

From: Colmar, France

Joined: 12/31/2007

*sarcastic* (8 days later...)

... you're welcome!

A simple "thank you" would have been enough!

I ask myself why I have spend time on research and answering...

/*sarcastic*

You must be logged in to post a reply. Please log in or register for a new account.