[Elecraft] [Elecraft-K3] K3S to be discontinued

[Edward R Cole]

Elecraft has made their design decisions for the K4.

Since someone suggested running a 100w 12v device at 60w then it 
occurs to me to obtain 100-120w then run two devices in parallel or 
push-pull.  Should not increase weight or drive requirements by a 
significant amount.  Cost probably under 150%.

I bought the K3/10 initially because i mainly operate VHF thru 
mw.  Later I bought a 10w KX3.  Then decided on the KXPA100 which 
either can drive with about 5w for full output thru 24m.  Of course 
the KXPA100 uses 12v devices but a clever ham could build a two 
device amp, instead.  Only on 6m is full 8w drive required for 80w 
output of the KXPA100.

I use the 1mw (nom) transverter interface to drive transverters on 2m 
and above so output is clean.  I have a 1000w linear* for 6m which 
drives with 11w from the KXPA100 (have to switch on the 3-dB attn on 
input to get that low).  The 1000w amp runs with 48v as do my 2m 
1500w and 600w 1296 LDMOS amps.  I keep output at start of saturation 
or lower on all the high power amps.

*6m 1000w amp is capable of 1600w 24/7 keydown AM operation on ch.2 
TV, so is loafing at 1000w which is the limit of my 48v - 50A PS.

73, Ed - KL7UW
   http://www.kl7uw.com
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