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LF: RE: Decca Experts - Converting Red to Purple ?

from [Dave G3WCB.] [Permanent Link][Original]
To: <[email protected]>
Subject: LF: RE: Decca Experts - Converting Red to Purple ?
From: "Dave G3WCB." <[email protected]>
Date: Sun, 4 Aug 2013 15:20:32 +0100
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Hi, Warren.
 
Mike G3XDV and David G0MRF have published information on converting Decca TXs. Perhaps a PM direct to Mike and Dave would produce more information.
 
From what I recall, you need to add more turns to the coils rather than pad the coils with more "C".
 
73, Dave G3WCB IO91RM
-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of Warren Ziegler
Sent: 04 August 2013 01:28
To: rsgb_lf_group
Subject: LF: Decca Experts - Converting Red to Purple ?

Hello to all of the Decca Navigator experts out there...

    I have an unconverted Decca 5501 transmitter which is marked "Red" - I believe that is 112kHz - would like to run it on 73kHz.  The tank coil reads about 80uH, can I just pad it down with more "C" to get to 73kHz or would that mess up the L/C ratio and thus lower the loaded "Q" ?

    Another question - anyone have a spare "Purple" Decca on 71kHz that they would consider parting with?



--
73 Warren K2ORS
                WD2XGJ
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1
                WG2XRS/1


 
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