[MRCA] Frankenstein Tuner Saga Continues

[Dennis DuVall]

Ah-so, you have four controls on the front of your tuner, three (3) for capacitors and one for the inductor.  I thought you meant ganging two caps together to make one dual unit.  This is  what is shown in the 1991 ARRL Antenna Handbook version of the SPC circuit.   I’ve always used a dual cap in the various versions of this tuner I’ve constructed and used over the years.  Apparently having the extra adjustment available is an advantage  in some cases.  Good to know.

73,

Dennis D.  W7QHO
Glendale, CA

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> On Oct 25, 2014, at 6:36 AM, B. Smith <smithab11 at comcast.net> wrote:
> 
> Yes, that is what I meant in the last sentence below.  Use seperate caps either in the originial "ultimate" circuit or the later "SPC" circuit. Those dual caps are getting pretty rare.
> Using separate caps allow really quicker tuning in some cases.
> 
> 
> On 10/25/2014 12:58 AM, Dennis DuVall wrote:
>> Taking another look the circuit is symmetrical except that the “output” series cap and the parallel cap across he coil are ganged together.  Wonder if there would be any utility in having all three capacitors adjustable separately.
>> 
>> What do you think?
>> 
>> Dennis D.  W7QHO
>> Glendale, CA
>> 
>> **********