[Kenwood] TS850 and SB200

[Clif Holland]

And I know exactly what happened. The amp line was plugged into the wrong 
socket on the back of the radio and the keying voltage was applied directly 
to an I/O chip that outputs 0-5v for AT250 band information. Fried the I/O 
chip.

I've fixed several of those. It has nothing to do with the amp keying relay.

Clif Holland KA5IPF
www.avvid.com




----- Original Message ----- 
From: "Michael Brown" <k9mi at sbcglobal.net>
To: <kenwood at mailman.qth.net>
Sent: Wednesday, November 19, 2008 8:42 AM
Subject: Re: [Kenwood] TS850 and SB200


> Pat, not to get things confused, I'm not the person with the SB200 and TS 
> 850. I was just commenting that the 12 volt relay on the 850 and the 120 
> volt relay on the SB200 (unless modified to work??) will need an amp 
> interface of some sort.
>
> Before I became a member of our local club, a TS 430 was hooked up 
> directly to an SB220. And the repair bill for the TS 430 was over $400.
>
> That was all I was referring to.
>
> 73 - Mike K9MI
>
>
> ----- Original Message ----- 
> From: Pat
> To: k9mi at sbcglobal.net
> Sent: Wednesday, November 19, 2008 07:34
> Subject: RE: [Kenwood] TS850 and SB200
>
>
> Hello Mike,
>
> i own the TS850 and the relay is 12 Volts and you have a little switch on 
> the rear side of thye
> TS850 to commute, if you do that you will here it working when you 
> transmit. Mine is working
> with the Ameritron AL-811 but you need to make a cable for the 
> commutation.
> BE VERY CAREFULL with the voltage on tube amps !!!! If you have to work on 
> it, disconnect
> the amp from the power voltage a few days before you open it and than put 
> a cable from
> high voltage caps to ground and let this cable like that during all the 
> time you work on it !!!
>
> 73 from Belgium
>
>                              Pat ON5SV
>
>
>
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