[ARC5] The value of MO and PA tank components.

Leslie Smith vk2bcu at operamail.com
Wed Mar 23 02:57:17 EDT 2016


To all:

I wish to learn the values of the oscillator and PA tank components in
the ATA, SCR and ARC-5 transmitters.

These are, for the oscillator:  T53, C60, C63 (M.O. turning) and C68.

For the PA Tank circuit: T54A & B, C65 (PA tuning), C66 and C67.

The manual gives the following information for T54:

    Frequency          Dwg #  (from WECO)
     3 to 4 MHz        7347
     4 to 5.3             7248
     5.3 to 7             7249
     7.0 to 9             7250

Information is given in Table #20, page 126 in hard copy. (or page #141
in PFD numbers) about these items, but not the value (uH, pF).  I
presume this is because different values are used for the different
frequency range in each type of transmitter.

I searched the tech manuals to my best ability.  My point here is that
I'm writing AFTER making a diligent search, rather than trying to avoid
this work.

If anyone on the list can advise where I might find component values for
the tank components I'll be grateful.

Thank you,

Les

-- 
http://www.fastmail.com - Does exactly what it says on the tin



More information about the ARC5 mailing list