[Elecraft] K3 Band changing...

[David Yarnes]

Alan and All,

I had nearly the same setup back in 1961-2 while stationed in Berlin, 
Germany.  Built the Apache, which worked great, then added the SB-10 shortly 
thereafter.  That was my first SSB venture, and you are right--the reports 
were good.  Problem was though, the Apache was not the most stable 
transmitter ever designed!  I had an annoying drift problem, which really 
gets accentuated on SSB.  But Heathkit readily attributed it to a design 
flaw on their part, and sent me different capacitors to use (temp. 
compensating).  Got the Apache settled down sufficiently (but not 100%), and 
life was good!  Kind of a brick though, compared to my 8 pound K3!

Dave W7AQK

----- Original Message ----- 
From: "Alan Bloom" <n1al at cds1.net>
To: "Bob Nielsen" <n7xy at clearwire.net>
Cc: "elecraft List" <elecraft at mailman.qth.net>
Sent: Thursday, May 29, 2008 6:04 PM
Subject: Re: [Elecraft] K3 Band changing...


> Many (many, many) years ago my station consisted of a Heathkit Apache
> TX1 transmitter, Mohawk RX-1 receiver, and SB-10 SSB adapter.  I figured
> that I had to switch or adjust a minimum of ---12--- controls to change
> bands.  If I needed to change between LSB and USB, add two more for a
> total of 14.  And that does not include switching antennas and changing
> the dial frequency if required (on both transmitter and receiver).
>
> That also does not include my 6 and 2 meter transverters.
>
> In those days I thought twice before deciding to change bands.  :=)
>
> On the other hand, the SB-10 phasing-type SSB exciter had absolutely
> WONDERFUL-sounding audio.  I got unsolicited compliments on nearly every
> QSO.
>
> Al N1AL
>
> P.S. The list as I recall it:
>
> TX-1:  Bandswitch
>       Tune/operate switch
>       Driver tuning
>       Driver gain
>       Plate tuning
>       Plate loading
> RX-1:  Bandswitch
>       Antenna trimmer
> SB-10: Bandswitch
>       Carrier null #1
>       Carrier null #2
>       Tuning
>
>
> On Thu, 2008-05-29 at 13:33, Bob Nielsen wrote:
>> You forgot to add changing the coils in the HRO receiver :^)
>>
>> Bob, N7XY
>>
>> On May 29, 2008, at 1:23 PM, Mark Bayern wrote:
>>
>> > Sure sounds easier than turning off the plate supply, opening the top
>> > of the cabinet, changing the coil(s), closing it up, turning the HV on
>> > again, then tuning the rig for the new band.
>> >
>> > Mark  AD5SS
>> >
>> >
>> >
>> > On Thu, May 29, 2008 at 3:04 PM, David Ferrington, M0XDF
>> > <M0XDF at alphadene.co.uk> wrote:
>> >> 5 presses?
>> >> --
>> >> A good cook is like a sorceress who dispenses happiness.
>> >> -Elsa Schiaparelli, fashion designer (1890-1973)
>> >>
>> >> On 29 May 2008, at 20:28, Dave G. wrote:
>> >>
>> >>> What's wrong with
>> >>> "FREQ ENT" -> '1' -> '4' -> '.' -> 'ENTER'
>> >>> ?
>> >>> --
>> >>> Dave G.   KK7SS
>> >>> '65 MK III Sprite in Richland, WA
>> >>> "Real stupidity beats artificial intelligence every time."
>> >>>   Terry Pratchett, 'Hogfather'
>> >>>
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>>
>> Bob Nielsen
>> n7xy at clearwire.net
>>
>>
>>
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