[AMPS] TS930s-SB220 Interface

[km1h @ juno.com]

I ran that combination for many years Len. Never had a problem.
Today, I would suggest adding 150-180 Ohms in series with the relay lead
inside the SB-220 and right at the phono plug. This will limit the
current and arcing altho the 930 relay is rated for the voltage and
current.
The same holds true with the TS-940

73   Carl   KM1H



On Sun, 30 Nov 1997 20:51:37 -0500 Len Schaier <schaier@avotec.com>
writes:
>Hello All,
>
>I will be using my TS930s to drive an SB220 I recently purchased and 
>will be receiving in a few days.
>
>The TS930s has an the internal relay intended to operate an amps T/R 
>relay. One side of the NO relay contacts is grounded to the TS 930 and 
>
>the other side is brought out to a DIN connector for the amp.
>
>I do not know the SB220's relay drive requirment except that I believe 
>
>you ground the low side of a relay whose high side is at approx 120 
>volts. Likewise the manual for the TS 930 does not state its relays 
>capabilities nor the capability of the wiring at the Din connector. 
>
>Assuming all parts and connections are as designed, is the relay, 
>wiring 
>and connector in the TS930 compatable with the TR circuits of the 
>SB220.
>
>Thanks in advance.
>
>Len
>
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