[Collins] Wanted: tuning slug for 75S-3

[Dr. Gerald N. Johnson]

526 is the prefix for a Collins assembly. The receiver is a 522 for the
S-3B and 3C. The only 526 number in that last manual is for the
mechanical filter, so maybe the 526 number is for when the part was
assembled in house, probably in the filter division that also sold
potted toroids, and the 288 is when purchased from an outside vendor. I
didn't get to know those details on the receiver, though my manual
update would have been better had I dug into revisions and the parts
list a lot closer.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association.

On 2/15/2011 6:53 PM, Bob and Sue Jefferis wrote:
> Jerry, I found one! It came from a basket case 75S-3B and it still
> had the original parts ID on it. It bears 2 part numbers and a date
> code. The part numbers are 526-5007-001 and 288-2214-00. The latter
> matches your reference. I suspect that the 526- may relate to the top
> level assembly, i.e., the receiver, not sure. The date code is 6552.
> Anyway, I am back in business and will soon have this RX in service.
> Thanks for looking at the later manual.
>
> 73, Bob KF6BC
>
>
> On Feb 8, 2011, at 6:15 PM, Dr. Gerald N. Johnson wrote:
>
>> Only the most recent manuals include a complete mechanical parts
>> list. The one for the 75S3B/C says all three slugs in the receiver
>> are the same part number 288-2214-000 while the latest 32S3A manual
>> shows all 5 are the same but a different part number. I'd have
>> thought them to be the same UNLESS they varied over the history of
>> the radios.
>>
>> 73, Jerry, K0CQ, Technical Adviser to the Collins Radio
>> Association.
>>
>> On 2/8/2011 9:27 AM, Bob and Sue Jefferis wrote:
>>> Greetings,
>>>
>>> I am looking for the rear "ANT" tuning slug for a 75S-3 slug
>>> rack, in good condition. Since the first stage RF transformer in
>>> the 75S-1, 75S-3, and 75S-3B have the same part number, I believe
>>> the slugs will be the same as well. The original that needs
>>> replacement has white and orange (or faded red) color code dots.
>>> Actually, all 3 of the slugs in this unit had the same color
>>> coding, so they may all be interchangeable, not sure.
>>>
>>> Thanks, Bob KF6BC
>>>
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