[Elecraft] Using the K2 with the XV144 and an external Linear

[Glenn McNeil]

Hi Group,

I'm presently running a K2 as an IF ( 28 Mhz ) and two Elecraft 
TRansverters...the XV50 and the XV144 ( and hopefuly the XV432 soon ??? ).

I have the System hooked up using the Daisy Chain Control cable as per 
the instructions in the XV Transverter Manual. I use a Station Sequencer 
that has the Station Mic plugged into it, and PTT from the Mic actuates 
the Sequencer in the normal fashion....firstly changing over the Tx/Rx 
Relay out at the Preamp, then keying up the Linear, then the XV144 and 
finally, the K2 is keyed up. The Sequencer keys the XV144 via the Key In 
Jack ( J4 ).

However, looking at the whole System and the XV50 and 144, it is 
apparent that the K2, when it has Transverters daisy chained off of it, 
keys up each Transverter as commanded from the K2, depending on what 
Transverter you select on the K2. The Transverters also have an External 
PA Key out ( J5 ). My question is this....

Do I need the Sequencer...or, is the K2 smart enough in its firmware to 
key the External PA Key line first, then the XV144/50 and then itself  
via the Mic PTT on the K2 ? .....i.e does the K2 recognise that a 
Transverter Band has been selected, and key the external" Bits" before 
keying itself to prevent hot switching etc.

I can see that the Ext PA Key Out ( J5) is driven from P1 on the 
Transverter, from a pin labelled " Key Out ". This appears to be 
seperate from the 8R/Key Line.

If this is the case, and the " Key Out " Line that drives Q4 goes high 
before the 8R/Key line, the System already has some sequencing built in 
and my external sequencer may not be required ?

Any ideas out there

73
Glenn
VK4TZL

Happy Owner of a K2, K2/100 and XV50/XV144 Transverters...with a spare 
space for the XV432



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