[Microwave] FS: Estate Items

[Dr. Gerald N. Johnson]

On 10/6/2014 10:44 AM, Walter Treftz via Microwave wrote:
> The following items are from the estate of retired microwave engineer. As a MF brasspounderI know little or nothing about them. They're untested although appear in excellent condx. Price is $15 each or both for $25 plus postage.
>
> 695)    U H F  Attenuator  (?)
>      Waveline, Inc. type 9026-1. Unknown usage. Micrometer vernier dial on side.
>      "N" coax connectors on each end. Used. untested.  Freq range: 2.0 - 12.4 ghz
>      Max VSWR: 1.5:1, Attn range: 0-17db (2 - 2.5 ghz), 0-20db (2.5 - 12.4 ghz)
>      Insertion loss: 1.0 db. Power rating: 10w. Size: 4.5" x 4" x 1.5"
>      Good physical condx.
> 860)    Coax Switch.Amphenol (RF Division) model 2N90R28D 4-connector coax switch. 115 vac powered.4 female "N" coax connectors. Power applied via 4-pin mail Amphenol (naturally) plug. Untestedas no plug available here. Excellent condx. If anyone has access to U S Patent files,maybe more info can be found here = 2,697,767   27591153,  2951925 or 2556869(if you find anything, pls let me know). Appears to be MILSPEC.
> 73 Walt (N4GL)(352) 637-1755

4 coax connectors probably means its a transfer switch. I didn't find 
that number in my Amphenol catalogs, where part numbers tended to have a 
310- prefix and all numbers, no letters, so it may have been a custom 
special or from a different era. I don't see evidence Amphenol staok RF 
relays were rated for more than 1 or 2 GHz.

73, Jerry, K0CQ
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