[Heathkit] Vintage Question..

[rbethman]

As Glen has posted, the "era" of SB-102s, HW-101s, and for that matter 
The HW-12s and others did very well loading with their Pi-networks.

I only had to go to an external tuner to demonstrate that I could load a 
bedspring and talk from my wife's sisters house with a piece of enameled 
wire.

The current solid state equipment either requires one due to the 
"foldback circuitry" to deal with the SWR that is exhibited when you get 
out of the "sweet spot" that a doublet is cut for.

Then again, the BC-610s and other "tall ships" on AM,, sometimes require 
one.  I have the BC-939 for the two BC-610s.  However, you also have to 
keep in mind that the BC-939s are NOT antenna tuners.  They are antenna 
COUPLERS.  There is a big difference!  There is NOTHING that is even 
remotely close to a 50 to 75 ohm output impedance from a BC-939.

I can't remember whether I used a homebrew tuner or something that was 
purchased to load those bed springs with that single wire.

Bob - N0DGN

On 2/25/2010 3:03 PM, Glen Zook wrote:
> The SA-2040 and SA-2060 have the same style knobs as the tube type SB-Line equipment.  However, the cabinet design is for the solid-state SB-104.
>
> Remember, the pi-network tuning in the tube type equipment did not really require an external antenna tuner, at least nowhere near as the requirement of the fixed impedance solid-state equipment.  To my knowledge the only antenna tuner that Heath made for a tube transmitter is the AC-1 which was made to use with the AT-1 transmitter.
>
> Glen, K9STH
>
> Website:  http://k9sth.com
>
>
> --- On Thu, 2/25/10, d_herr at juno.com<d_herr at juno.com>  wrote:
>
> I've been looking for a vintage Heath antenna tuner that fits the SB-101 model but without success.
>
> Can any of you history buffs tell me the model number of the first antenna tuner Heath put out and/or if they made one to look like the SB-100, 200, 301, 401, etc. line?
>
>
>
>
> ______________________________________________________________
> Heathkit mailing list
> Home: http://mailman.qth.net/mailman/listinfo/heathkit
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Heathkit at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>    

-- 
+------------------------------------------------------------------+
|               AM Amateur Radio Operator    NØDGN                 |
+------------------------------------------------------------------+
|               http://home.comcast.net/~rbethman/                 |
+------------------------------------------------------------------+
| Bob Bethman                \\\|///     " The absence of a danger |
|                           \\ ~ ~ //      signal does *NOT* mean  |
| rbethman at comcast.net      (/ @ @ /)      that everything is OK " |
+----------------------o00o---°(_)°---o00o-------------------------+