|
Ken
Tnx info.
I would stick to the up/down key until you are sending
good morse at around 20 wpm then use a paddle. You can use the double paddle as
if it were a single and not as iambic, this is what most operators
do.
I like the RTTY 85 hz shift mode and when I get a
transverter built some time later I will try it, maybe also Amtor es
Pactor
Cannot understand the delay in procedures for 1st Jan 2013
472 band
73 gl de mal/g3kev
----- Original Message -----
Sent: Thursday, December 20, 2012 9:47
AM
Subject: LF: RE: Re: RE: MORE
VALVES
Hi Mal. Thanks for
the info, in my younger days as an electrical engineer occasionally had to
work on live bus-bars so know the dangers, one of use got very badly burnt one
day. I am still not clear regarding the NoV for 472kHz, I would have thought
that if approved by WRAC then NoVs would not be required. I will try to
improve my cw and meet you on the new band soon, I do enjoy cw although not
very quick, at present I am using an RAF ?D? type, have tried a double paddle
keyer not much success, am going to try a single paddle, what would you
recommend?
73s.
Ken
M0KHW
The valve and base in the picture
is a 4CX1500B that was intended for 137 Khz not 500 Khz.
At present both on 137 es 500 I am
using solid state Transmitters, which are probably safer. I do have a
selection of Dentron Amplifiers for the HF Bands with 8875
valves.
Watch those High Voltages, no
margin for mistakes, one Wobble and you Vaporise
!!
----- Original Message -----
Sent:
Wednesday, December 19, 2012 8:20 PM
Subject: LF: RE:
MORE VALVES
Hi
Mal.
What valve are you
using? I am currently building a TX with a 6293 Beam Tetrode in the PA. the
building of the two power units has slowed the construction down with the
inter-linking control cables etc. The PA xformer is 650 ? 0 - 650 volts @
400mA with a bridge rectifier, the valve max anode voltage is 3Kv and anode
current 1.5A. I am hoping for Class C, 500 watts output cw on 472kHz (if we
ever get the NoV).
73.
Ken
M0KHW
This is a 137 Class C
amp project, but since CW activity has dropped to virtually
NIL I am not rushing to complete.
|
