GW3XJQ > HELP 07.08.07 10:38l 24 Lines 1212 Bytes #999 (0) @ WW
BID : 25039_GB7CIP
Read: GUEST
Subj: MAGNUM FOUR TRANSVERTER
Path: DB0FHN<DB0MRW<DB0HOT<DB0ERF<DB0FBB<DB0IUZ<DB0GOS<DB0RES<TU5EX<I0TVL<
LA1SFS<GB7CIP
Sent: 070807/0826Z @:GB7CIP.#32.GBR.EU #:25039 [Caterham] $:25039_GB7CIP
From: GW3XJQ@GB7CIP.#32.GBR.EU
To : HELP@WW
Anyone still using or even owning an old Magnum Four 70 MHz transverter
made about 30 years ago by Stephens James UK?
I have resurected mine which I used to use in the "old days" being driven
with a 28 MHz signal from an FT101 B which also used to supply all the re
quired HT supplies and grid bias and LT for the Rx converter which is a
Microwave Modules unit fixed to the back panel of the transverter.
I am intending running it again soon when I have a 4 M yagi erected but
now have an FT101Z which was not designed to power up a valved
transverter.
The main "difficulty" I think is that the 101Z uses 6146 B's in the pA
and thus HT is 900 Volts which is a bit too high I think for the QQVO6 40
A PA in the 4 metre transverter.
I have been looking at the PSU circuit in the FT101Z and there seems to b
e some spare secondary HT winding tappings that could produce a lower HT
and am wondering therefore whether anyone has any information about this
rather "rare" transverter as a request for information on the 4 metre
website and Forum has not revealed anyone who either uses one or even
remembers much about it?
73 Martin GW3XJQ
gw3xjq@hotmail.com
Read previous mail | Read next mail
| 
