[Johnson] HeathKit VF-1 Viking 2 wiring

[C E]

Hi Glen:
Are you sure about this? From what I gather, the VF-1
is essentially a copy of the 122 VFO. Several years
ago, I simply rewired the plug to fit a Vik 2. Worked
fine (except for the drift which I probably could have
fixed with your mod). 

FWIW. Cal, N6KYR
--- Glen Zook <gzook at yahoo.com> wrote:

> Download the manual for free from BAMA at
> 
> http://bama.edebris.com/manuals/heath/vf-1/
> 
> All the information that you need is there.
> 
> However, the VF-1 will be more stable if you do the
> following:
> 
> First of all replace the 6AU6 tube with a 6AH6 tube.
> 
> This is a direct replacement and this will
> definitely
> stablilze the VFO.  Heath had to do this with the
> early Apache transmitters to get the VFO stable
> enough
> to use on SSB.  The only thing that you might have
> to
> do is to "touch up" the variable capacitors (one on
> the 160 meter section and one on the 40 meter
> section)
> to retain the calibration.  This is because the 6AH6
> has a slightly different interelectrode capacitance
> than the 6AU6.  The inductor tuning should not
> change.
> 
> Next replace the 0A2 screen regulator with an 0B2. 
> This drops the screen voltage to a regulated 108
> volts.
> 
> Then do NOT use the transmitter for the power
> supply. 
> Run the VFO with a regulated 150 volt power supply
> (you can use the 0A2 removed from the screen circuit
> to regulate this voltage).  The original
> specifications call for 300 volts as the B+. 
> However,
> the VF-1 is VERY happy with 150 volts regulated as
> the
> input and this helps additionally with stability. 
> No
> modifications to the unit are required.
> 
> Finally, do NOT try to key the VFO on CW.  It will
> definitely chirp.  This is true of just about any
> older VFO.  When the transmitter is put in the
> transmit position then a relay should be used to
> turn
> on the VFO continuously.
> 
> The VF-1 can definitely be used with a PL-259
> instead
> of the pseudo crystal plug.
> 
> There are actually 2 different versions of the VF-1.
> 
> However, the differences are cosmetic only.  The
> earlier version (which is "rarer") has 3 lines
> around
> the permiter of the front panel; has a more "bronze"
> color; the lettering is a dark brown; and has
> circles
> painted around the small knobs.  The later version
> has
> only 2 lines; is a more "silver color"; the
> lettering
> is more of a black color; and there are no circles
> around the knobs.
> 
> Glen, K9STH
> 
> 
> --- Ron Lawrence kc4yoy <kc4yoy at carolina.rr.com>
> wrote:
> 
> Can anyone help me with the wiring mods needed to
> use
> a HeathKit VF-1 VFO with my Viking 2 transmitter?
> The
> VFO came to me wired for a Globe Scout. I need to
> know
> what the wiring is for it to be powered by the
> Viking.
> Also the VF-1 has a plug for a crystal socket, can I
> change it to a PL-259 to connect to the VFO
> connection
> on the Viking which is a SO-239.
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Glen, K9STH
> 
> Website:  http://k9sth.com
> 
> 
>        
>
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