Thank you Mal!
73 K2ORS
On Fri, Nov 4, 2011 at 3:23 PM, mal hamilton <[email protected]> wrote:
> LF
> Decca mods info
> Hi Band Model 5501 E
> Measuired L= 66uH on orig freq
> C = 23.7 nH
> therefore to retune to 137 Khz needs a 150 nF capicator in series with
> existing C result 137.0 Khz
> This is the most convenient model to modify for the LF BAND
> If you are fortunate to have one of these models, you could be in business
> after a couple of hours.
> Specified drive is 4.5 volts sq or sine wave although some extra drive is an
> advantage say 7 - 10 Volts
> If you have a spare PA capacitor board for the lower freq units there are
> plenty of 150 nF capacitors for the mod.
> These amplifiers and individual units ( 3 per amp) are easily modified for
> any freq of interest 600, 160, 80 metres and maybe even 40 metres. Each
> individual unit will produce around 400 Watts at around 67 volts into a 71
> ohm load or alternatively use 60 volts into a 50 ohm load.
> More info available if needed
>
> 73 de mal/g3kev
>
>
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73 Warren K2ORS
WD2XGJ
WD2XSH/23
WE2XEB/2
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