[time-nuts] Re: General Radio 1105-A Frequency Measuring Equipment, parts wanted.

[paul swed]

Stijn
I am looking forward to following your progress on the 1105a. I did look up
schematics and specs. That is something like 500 LBs worth of equipment.
Each unit seems to be about 30 LBs. But what strikes me is its looks in
really good shape. It must have been stored in a very good environment to
look the way that it does.
I have seen the other posts on plugs. I have on ocasion needed the same
plugs and they are hard to obtain today.
Regards
Paul
WB8TSL

On Mon, Aug 23, 2021 at 10:22 AM paul swed <paulswedb at gmail.com> wrote:

> Stijn
> A very nice picture of the complete system.
> I assume your in the Netherlands. I actually have seen various components
> in a basement in NJ. At least I am pretty sure thats what I had seen.
> But that also means shipping would be very costly.
>
> With respect to the oscillator I agree with Bob return it to the original
> state if possible.
> These days finding the types of parts that are used in the system are
> becoming more difficult. 1/2 watt and larger resistors that can handle the
> various voltages. At least with tubes while hamfests still existed they
> actually didn't seem that hard to come by. I picked up numbers of NOS tubes
> for WWII radios without any issue. They worked well.
> Would be great to see the system working again. Then you can hook up a GPS
> system to it and make the worlds most heavy GPSDO.
> Good luck.
> Paul
> WB8TSL
>
>
>
>
>
> On Mon, Aug 23, 2021 at 9:36 AM Bob kb8tq <kb8tq at n1k.org> wrote:
>
>> Hi
>>
>> There is a General Radio list
>>
>> GenRad at groups.io <mailto:GenRad at groups.io>
>>
>> That would be a pretty good bet for finding the various connectors.
>>
>> I last saw (and unfortunately did not buy) one of these beasts back
>> in 1973. I can’t say I dug very deep into it on the dealer’s floor. From
>> what little I remember, you best bet on the oscillator may be to wire
>> it back as close to the original schematics as you can.
>>
>> Next bit of fun is going to be finding working versions of the ocean
>> of tubes it uses …..
>>
>> Bob
>>
>> > On Aug 23, 2021, at 9:15 AM, Stijn <pe1rks at xs4all.nl> wrote:
>> >
>> > Seems that the pictures got scrubbed:
>> >
>> > Links:
>> >
>> > The equipment I am working on:
>> > https://www.pe1rks.nl/plaatjes/GR_1105A/IMG_0030.JPG
>> >
>> > The GR 774 connectors that I am after:
>> > https://www.pe1rks.nl/plaatjes/GR_1105A/IMG_0115.JPG
>> >
>> > The mains connectors that I am looking for need to fit these:
>> > https://www.pe1rks.nl/plaatjes/GR_1105A/IMG_0116.JPG
>> >
>> > The oscillator module that I would like to replace:
>> > https://www.pe1rks.nl/plaatjes/GR_1105A/IMG_0013.JPG
>> >
>> > Sincerely,
>> >
>> > Stijn
>> >
>> > Op 23-8-2021 om 15:04 schreef Stijn:
>> >> Fellow Time-nuts,
>> >> I have for some time a General Radio 1105-A and I have started to
>> resurrect this two rack Frequency Standard combined with Frequency
>> Measuring Equipment.
>> >> There are some repairs to be made and some units require some more in
>> depth restoration, but to be able to complete this task and get all working
>> like it once should I need some parts.
>> >> What I need are some General Radio 774 connectors, 8 to be exact:
>> >> I am also in need for 6 of the connectors fitting this mains entry:
>> >> And the worst part is the Piezo Oscillator, the Quartz bar is there
>> and in good condition the oven is also working. But the oscillator circuit
>> has been heavily modified.
>> >> Instead of the original bridge circuit they have build a totally
>> different oscillator and I can't get this to work.
>> >> So here are my questions:
>> >> Does anybody have or know a supplier for the needed connectors?
>> >> Is there someone out there who has just the Oscillator module for the
>> Piezo-Electric Oscillator and is willing to sell and ship this?
>> >> Sincerely,
>> >> Stijn Nestra
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