开云体育

Honk if you have a working 661. (Kurt honks)

Honk! triggers from 'cal' on 'A' channel only, but it's a start. Needs a new thermal delay relay too - got a part # on that btw?

I'm not honking, but the Tek part number for that relay is 148-006 (so
probably 148-0006-00).

Dave Casey

Sorry, meant the Amperite part#, looking to source a replacement. Similar part died on my 545a some 20+ years ago. I ended up (non destructively) sticking a damn button of the side of the unit to short the contacts.

The 519 manual calls out the same Tek part number but also describes it
as a 26NO45T in the parts list. The schematic omits the "T" in the part
number. Hope that helps!

Dave Casey

According to page 3 of the datasheet, the 26NO45 would be a 26 volt heater,
normally open contacts, and 45 second delay. The absence of a "T" at the
end would denote an octal base part, but I believe the delay relay in the
519 has a 9-pin miniature base, so the parts list is correct and the
schematic is not. Maybe very early 519s used the octal base delay relay
and they forgot to update that part of the schematic.





On Mon, Nov 24, 2014 at 1:33 AM, Dave Casey dcasey@...
[TekScopes] <TekScopes@...> wrote:

The 519 manual calls out the same Tek part number but also describes it
as a 26NO45T in the parts list. The schematic omits the "T" in the part
number. Hope that helps!

Dave Casey

On 11/23/2014 8:30 PM, devpool0@... [TekScopes] wrote:

Sorry, meant the Amperite part#, looking to source a replacement.
Similar part died on my 545a some 20+ years ago. I ended up (non
destructively) sticking a damn button of the side of the unit to short
the contacts.

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thank you both! Last night I had to jump it, but tonight it fired right up. I'll hunt down a replacement anyway. Some re-seating of internal connectors on the 4S1 got internal triggering working properly, channel 2 still needs some attention.
BTW: Kurt - my memory boards are valve-free, have 7 TO-92 transistors, 1 TO-39 dual transistor (maybe wired as a darlington pair?), and are on a PCB, ?1966. Serial of the 4S1 is 135. I'll post some pics.

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...and then I got to the back of the manual and saw the series 11, model 7. That's what I got.