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Nikola Dulgiarov (Nikola)
New member
Username: Nikola

Post Number: 2
Registered: 8-2005
Posted on Monday, October 3, 2005 - 10:16 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

I read an old book about radio-engineering and I want to ask is a trimer a variable capacitor?
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Simon Quellen Field (Sfield)
Senior Member
Username: Sfield

Post Number: 735
Registered: 12-2004
Posted on Monday, October 3, 2005 - 10:35 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

A trimer is a chemical reaction product consisting of three identical molecules (called monomers).
It is a very short polymer.

You are probably thinking of a trimmer, a kind of variable capacitor used to trim, or fine-tune an oscillator or tuner.

(Message edited by sfield on October 3, 2005)

(Message edited by sfield on October 3, 2005)
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Nikola Dulgiarov (Nikola)
New member
Username: Nikola

Post Number: 3
Registered: 8-2005
Posted on Monday, October 3, 2005 - 1:23 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Can I use it for the 10 minute radio?
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Simon Quellen Field (Sfield)
Senior Member
Username: Sfield

Post Number: 737
Registered: 12-2004
Posted on Monday, October 3, 2005 - 7:27 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Probably not.
A trimmer capacitor by definition has a smaller range than a tuning
capacitor. It is used for fine tuning, not coarse tuning.
The Ten Minute Radio uses a 160 picofarad variable capacitor.
If your capacitor has that range, then it will likely work, otherwise
not.

Bear in mind that you can get the whole kit for $8 in our catalog,
so it is usually easiest just to get all the parts at the same time.
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Nikola Dulgiarov (Nikola)
Junior Member
Username: Nikola

Post Number: 4
Registered: 8-2005
Posted on Tuesday, October 4, 2005 - 6:10 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

I dont have a credit card.
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Simon Quellen Field (Sfield)
Senior Member
Username: Sfield

Post Number: 739
Registered: 12-2004
Posted on Tuesday, October 4, 2005 - 11:12 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

But you probably know someone who has one.
They are really easy to get these days.
My friend's dog was sent an application once.
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Nikola Dulgiarov (Nikola)
Junior Member
Username: Nikola

Post Number: 6
Registered: 8-2005
Posted on Friday, October 7, 2005 - 12:12 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Can I use a loudspeaker from a 32ohm headphones as a microphone?
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Simon Quellen Field (Sfield)
Senior Member
Username: Sfield

Post Number: 747
Registered: 12-2004
Posted on Friday, October 7, 2005 - 12:24 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

With a proper amplifier, yes.
Something like this will do nicely.
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Nikola Dulgiarov (Nikola)
Junior Member
Username: Nikola

Post Number: 7
Registered: 8-2005
Posted on Friday, October 7, 2005 - 1:01 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Can I use the 1 watt amplifier.
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Simon Quellen Field (Sfield)
Senior Member
Username: Sfield

Post Number: 748
Registered: 12-2004
Posted on Friday, October 7, 2005 - 1:21 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

The integrated circuit amplifier will do a better job.
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Nikola Dulgiarov (Nikola)
Junior Member
Username: Nikola

Post Number: 8
Registered: 8-2005
Posted on Friday, October 7, 2005 - 1:54 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Could a solar cell froma calculator as a reciever in the laser comunicator.
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Simon Quellen Field (Sfield)
Senior Member
Username: Sfield

Post Number: 749
Registered: 12-2004
Posted on Friday, October 7, 2005 - 2:15 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Connected to a piezoelectric earphone or an amplifier, yes.

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