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ZL3AI > TAIT 05.11.04 00:08l 24 Lines 893 Bytes #999 (0) @ WW
BID : ZL3AI1766
Read: GUEST DL1LCA
Subj: Re: Tait T500 Programming
Path: DB0FHN<DB0MRW<OK0PPL<DB0RES<ON0AR<ZL2BAU<ZL2BAU<ZL3VML
Sent: 041104/2247Z @:ZL3VML.#80.NZL.OC #:36394 [Chch-NZ] FBB7.00i $:ZL3AI1766
From: ZL3AI@ZL3VML.#80.NZL.OC
To : TAIT@WW
>From: ZL3TPN@ZL2SUN.#70.NZL.OC
>To : TAIT@WW
>
>Rx is offset as your programs will probably tell you and I can look it up if
>needed. I have some Taits which play up and it's mostly the "tiny trimmers"
>in the PLL getting dirty and needing to be replaced.
The tiny trimmers (Murata trimcaps) in the PLL in some T500s suffered from
getting the lubricant washed out of them when the PCB was washed in a
solder flux dissolving liquid. I think the symptom was that microphonics
would occur. The cure in the manufacturing process was to use a version which
had a seal of something like sticky tape applied, and it was removed after the
washing process.
The cure for radios in the field would be to replace the trimcap with a new
one.
73 David.
(former Tait employee)
T4 1.5à24
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