SB-200

[Jan Ditzian]

I do not have an answer for Corky about how to tune the input coils, but 
I can say that my SB-201 has a 1.3:1 or lower input swr on 80 through 15 
(no 10 meters on this amp).  You should be able to tune the input coils 
to make the amp look good to a transistor-output exciter without an 
additional tuner and the need to retune it for every band change.

73,

Jan, KX2A


RAY FRIESS wrote:
> Corky:
> It sounds like youre trying to use the 200 with a solid state rig.
> The easiest way would be to get a low power tuner and use it between the rig and the 200.
> One of the disadvantages of these new solid state thingies is that they need to see a low swr or they automatically reduce their power output.  That happens when they see an input impedance similar to the older amps ..    
> Those of us who still use tube rigs don't have to worry about such things because the output circuit of the tube rigs is tunable and will match the impedance of the tube amp input...
> 
>   ----- Original Message ----- 
>   From: Corky Kirk<mailto:w6ors at YAHOO.COM> 
>   To: HEATH at LISTSERV.TEMPE.GOV<mailto:HEATH at LISTSERV.TEMPE.GOV> 
>   Sent: Thursday, January 25, 2007 5:32 PM
>   Subject: SB-200
> 
> 
>   1-25-07
>   Am in the process of setting up this SB-200 amplifier.
>   I have dipped the input coils to their respective
>   bands and added capacitence where needed, and now want
>   to set them up to the exciter, understanding this has
>   to do with low VSWR.
> 
>   The Heath manual gives no directions on how to do this
>   procedure.
> 
>   Can anyone direct me where I might find the info?
> 
>   73,
>   Corky W6ORS
> 

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://listserv.tempe.gov/archives/HEATH.html