Warren
I have all the original handbooks for the Decca 5501 range if you need
specific info let me know. The low band versions have a different Capacitor
board and are easy to mod for 73 Khz
The higher band versions are not so convenient to mod for 73 but more
suited to 136.
I have 2 x 5501 units for the high band modified for 136 but fortunately I
have 2 x C boards for the low band so I just need to modify the Coils for
73 if we got this band again
I was active on 73 towards the end but by then nearly everyone had moved to
136
Most hams in the UK were using modified Audio amps on 73 and I do not
recall anyone using the decca on that band at the time. Decca amps were not
available in the early days of 73
Modes at the time were CW and QRSS
mal/g3kev
Sent: Sunday, August 04, 2013 1:28 AM
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
