[NJARC] Test tube?

Joe Cro n3ibx at verizon.net
Thu Mar 8 01:14:14 EST 2007


John,
        The only answer I can give is "not enough". Big transmitters are 
like 'Jello" - There's always room for more!

Instead of retuning your rig for a different band, or portion within, 
wouldn't it be nice to have a station setup with a transmitter and receiver, 
all set to go on a different band? All you'd have to do is to flick a switch 
to connect each station to an antenna; turn on the receiver and transmitter, 
and you'd be there.

One caveat: High power AM isn't compatible with certain coaxial switches. 
You can actually blow 'em apart, or create a carbon track that's nearly 
impossible to remove.

You're better off going from the link coupled output of your transmitter, 
directly to the balanced feedline, and tune out the reactance with the tank 
circut inside the transmitter. I use a 20" flourescent tube strapped to my 
feedline as a RF and modulation indicator. If it glows brightly, and 
pulsates even brighter while I modulate, I know it's working!

Mod-U-Later,
                      Joe Cro N3IBX

PS: Front to back gain comes from antennas - Forward gain comes from the 
wallsocket!
PPS: I believe in "Antennas by Eimac"

----- Original Message ----- 
From: "john ruccolo" <jr6v6gt at yahoo.com>
To: "New Jersey Antique Radio Club" <njarc at mailman.qth.net>
Sent: Wednesday, March 07, 2007 9:23 PM
Subject: Re: [NJARC] Test tube?


> Visit our web site - See http://www.njarc.org
> _______________________________________________
> Hi Joe,
>
> I gotta ask -- how many BIG RIGS do you have? I'm
> talking both ex-military (BC-610, T-368, etc.) and
> ex-Broadcast.
>
> You awe me more with each email. ;-)
>
> JR
> --- Joe Cro <n3ibx at verizon.net> wrote:
>
>> Visit our web site - See http://www.njarc.org
>> _______________________________________________
>> Steve,
>>          Your WE 242C is just about identical to a #
>> 211 tube, or military
>> designation VT-4/C. The only difference is the 211
>> has a mu of 12.0 vs the
>> WE 242 which is 12.5. The two tubes can be
>> interchanged without circut
>> modifications in most instances.
>>
>> Pins 2&4 are the filament, pin 1 is the grid, and 3
>> the plate.
>>
>> Unfortunately, the two transmitters I have that use
>> your tube aren't yet
>> operational. Just wanted to give you some additional
>> information about it.
>>
>> Regards,
>>              Joe Cro N3IBX
>>
>>
>> ----- Original Message ----- 
>> From: <StephenTetorka at cs.com>
>> To: <njarc at mailman.qth.net>
>> Sent: Tuesday, March 06, 2007 10:19 AM
>> Subject: [NJARC] Test tube?
>>
>>
>> > Visit our web site - See http://www.njarc.org
>> > _______________________________________________
>> > Hi all:
>> >
>> > Might anyone be able to test my Western Electric
>> 242C?
>> >
>> > Tnx,
>> > Steve
>> > _______________________________________________
>> > NJARC mailing list
>> > NJARC at mailman.qth.net
>> > http://mailman.qth.net/mailman/listinfo/njarc
>> >
>>
>>
>> _______________________________________________
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>
>
>
>
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