[1000mp] Mark V Relay Info

[Ronald Long]

I have gathered together some facts about the Mark V relays and thought it 
might be useful. It is not clear to me that there is one relay that always 
causes the loss of sensitivity, although I suppose the T/R relay is the one 
to suspect first, as most people have said.
I have tried to get the columns in the data below to line up but who knows 
what my email program, the server, and your email program will do to it. ron
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Summary of FT1000MKV Relay Part Numbers, Types, Locations and Purposes.

Information from the MarkV Technical Supplement CD.

The RX signal path is,sequentially, as follows (Page 4-1).

Start with Tuner-Main Unit.
    Ant Connector A or B selected by RL6452 and RL6453.
    Then to T/R Relay RL6451.
Now to RF Unit.
    RX Antenna Selected by RL1002 (misprint in page 4-1 text).
    Attenuator RL1003 - RL1005.
    Narrow band preselector (if VRF ON - RL1006 - RL1015.
Next is 5th order Chebyshev LPF and then BPF.

Filter part numbers and types.

Tuner-Main Unit (18 relays) Page 6N-7
    RL6401 - RL 6414  -  AGP2003
    RL6450            -   FBR321D012
    RL6451            -   TC-112NV (this is the T/R relay)
    RL6452 - RL6453   -   AGP2013  (A/B Antenna Select)

RF Unit  (18 relays)  Page 6A20
    RL1001            -  AG4013
    RL1002            -  ATX203  (this is RX Antenna Select)
    RL1003 - RL1004   -  AG4013  (Attenuator)
    RL1005            -  ATX203  (Attenuator?)
    RL1006 - RL1015   -  ATX203  (Preselector filter if VRF ON)
    RL1016 -  RL1018  -  AHY123

LPF-1 Unit (14 relays)  Page 6L-6
    RL6001 - RL 6014  -  AGP2013
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