[JMS] National 600 Watt Transmitter Resurrection
Brian K Harris
brian.k.harris at philips.com
Tue Oct 4 09:18:28 EDT 2005
Please join me in the fun and challenge of recreating the RF final/buffer
portion (NT-100PC) of this extremely rare transmitter by thoroughly
canvassing your junk boxes. Anyone providing material for this project
will be duly recognized in the Electric Radio article that will result
when this transmitter is completed.
I need the following:
QTY
(2) National Type O knobs - 3.5" diameter with 0-100 scale over 180
degrees
(1) National TMC-100D variable capacitor - dual section for buffer plate,
100 pf per section, has 13 plates, good fo 3KV
(1) National TMA-40DC variable capacitor - dual section for final plate,
40 pf per section, 11 plates, good for 12KV
(2) National NC-150 neutralizing capacitor - for final, medium size
(1) National NC-800 neutralizing capacitor - for buffer, small size
(1) National XB-15 final plate coil socket, five pins in-line
(1) National XB-5 buffer plate coil socket, five pins in-line, about 3.5"
long
(2) National R-100 RF chokes
(5) National XR-10A final coil form
(5) National PB-15 coil form mounting bar
(5) National XR-13 buffer plate coil form
(5) National FXTB-6 buffer grid coil, 6 prong (these are in metal cans and
have two small 25 pF variables)
(4) National GS-1 insulators (1/2" x 1-3/8")
(4) National GS-8 lead-through insulators for B+, etc.
(1) Triplett 0-100 mA 326 style
(1) Triplett 0-500 mA 326 style
I will gladly accept lesser quantities of any of the above items. I will
pay generously or, if you so desire, I have lots of hard-to-find trading
material including vintage HV transformers and chokes, knobs (some
Collins, National), National Velvet dials, meters, B&W link coupled coils
and pi-networks, tubes (845, VT-4C, 75TL, Western Electric, etc.), Bud
coils, scads of transmitting variables, mod iron and much more than I can
list here. Please tell me what you are looking for if you have any of the
above parts.
Thanks for reading.
Brian K. Harris, WA5UEK
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