HW-101: More Mods recovered.
Joseph W Lutz
joelutz at JUNO.COM
Tue Dec 8 19:32:32 EST 1998
Found a 18 year-old letter from a John Benson that was sent to me while I
was operating from /DU2 with my HW-101 [and making many friends]. It
contains the following Mods that John had made on his HW-101:
1. Tubes - V10 and V11 - changed to 6HS6 from
6AU6.
2. R113 - Screen circuit of V4. Change to 4700 or
10,000 ohms to improve IF response.
3. R106 - Screen of V3. Change to 33,000 ohm 1
Watt. Prevents "S" meter drift.
4. R107 - Screen of V3. Change to 100,000 ohm 1
Watt. Prevents "S" meter drift.
5. Pilot Lamps - Should by #47 - not #44 lamps.
6. R202 - Grid circuit of V5. Remove and replace
with a jumper wire to improve transmit
drive, especially on 40 meters.
7. Comb Brackets - Used to position the switch boards.
These brackets were aluminum, are now
plated steel - [PN 204-2096]. Brackets
should be soldered to the circuit board
shields and to the outside corner [side
rail side] at the driver grid and driver
plate boards. This improves grounding
for the driver circuity.
- - - - - - - - - - - -
73 de Joe W7LPF/4 [NNN0KUU]
QWCA - SOWP - NCVA - FISTS - RCC
Gordonsville, Va 22942 [Orange Co]
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