[NJARC] Re: 7 Pin Sockets

[Al Klase]

Guys,

This all started with some captured Viet-Cong home-made equipment in US 
ammo cans that were on display in the Ft. Monmouth museum many years ago.
About 4 years ago I built a two-tube regenerative superhet in a 30-cal 
can that tunes 80 and 40 meters, dubbed Uncle Ho.

Last weekend's festivities got me back to thinking about a simple AM 
transmitter to go with it.  I want to take a whack at the early TBX 
circuit:  An 837 crystal oscillator, suppressor modulated bu\y a carbon 
mike and transformer.  A watt or two will be plenty for short range working.

Pix in separate email.

Regards,
Al

JOE CRO wrote:
> Visit our web site - See http://www.njarc.org
> _______________________________________________
> Ray,
>      Only real men use grid, grid bias,supressor grid,cathode, and 
> series modulation! The novelty lies in getting the most efficency 
> without the additional expense of a class B modulation transformer. If 
> all is resistance coupled, the audio quality can be quite good, since 
> you don't have any transformers to contend with. If carefully 
> executed, it's possible to attain 40-45 percent efficency using some 
> of the above modulation techniques, a bit less with others. The only 
> real trick is to load your final tube heavy to get some steam out of 
> it, with the above techniques.
>
> Regarding the "Lunch Box Rig", are you referring to the little 
> Heathkits aka: "Benton Harbor Lunchbox" style rig? They're a hoot, and 
> sport a super regenerative receiver to boot. You transmit on your 
> crystal controlled frequency and tune the receiver up and down the 
> band until you get a reply (if you're lucky) or a complaint (more 
> common)- hi! At least with the complaint you'll know you're getting out!
>
> I wonder if Al had something else in mind with a "lunchbox" type rig?
>
> Will Al be going directly into the first grid of a #53 dual triode 
> with a single button carbonium microphonium for his speech 
> amp/modulator? Or, as John Rucolo stated, making the 53 do double duty 
> as a reflex receiver?
>
> This is all AM technology at it's pinnacle!
>
> Supressor Grid or Cathode, Mod-U-Later,
>                                                                 Joe 
> Cro N3IBX
> ----- Original Message ----- From: "Ray Chase" <enrpnr at erols.com>
> To: "NJARC" <njarc at mailman.qth.net>
> Sent: Wednesday, July 25, 2007 9:16 AM
> Subject: [NJARC] Re: 7 Pin Sockets
>
>
>

-- 
Al Klase - N3FRQ
Flemington, NJ
http://www.skywaves.ar88.net/