Watch for "Stancor 60-P Transmitter"
story in up-coming Electric Radio Mag!
My next project...Winter 2007-8
The vintage
AM/CW stations
at
W8TOW
A panoramic view of my shack.
Since the "Gates 250GY" incident, my shack has changed a little.
Here are some new pictures!
The main station in the middle is the Collins 32V3 & 75A4 with the T-200 PP HB Tx. To the right is the Johnson 500 station Ranger for 10 thru 160 Meters coupled to a SX-100. On the right side of the room is a 8 foot long 3 foot deep space reserved for 6 foot rack and panel transmitters. This area houses the Taylor T-200 PP x 203Z's rig; W6SAI PP 4-250 transmitter; and last is the ALL-STAR transmitter.
My main station
Taylor T-200 AM transmitter
The Big Rig
Just some pictures of my T200 project. Nothing new,
simply bringing back some photos that havn't been on the web for awhile.
Taylor T200's in PP modulated by 203Z's .
The RF deck is done, a B&W Butterfly cap in the tank circuit with a Johnson output coil.
The modulator will be a pair of Taylor 822's in Class B later this fall. Both the Class C and Class B decks have their own power supplies. About 2000 VDC at 500mA is available for the T-200's and a 1250 Volt supply is used for the Class B. The transmitter is driven by Collins 32V3 exciter and I use a 75A4 for receiving.
Next around the shack is my Viking 500 & Drake 2B station ( my primary CW station) next to a Hallicrafters SX-100 & Ranger for the 160 Meter band.
1948 HB 812's modulated by class B 811's. Serving as my 160m rig now.
Pretty conventional for the 1940's. It looks similar to designs in a 1941 "RADIO HANDBOOK" but the parts are from the late 1940's or even early 1950's. While visiting a ham store in St. Joe, Michigan, COMDAC , I found a 3000 vac CT transformer with taps at 1300 vac and 1500 vac rated at 1 amp. I've used a 20-5 H swinging choke that I already had on the shelf. For the fixed choke, I used a 10 H 500 mA choke which came with the plate transformer! Combined with a couple of 15 uF caps it is a husky power supply. The Speech amp uses a Stancor dual 6J6 clipper/filter, 6SJ7, 6V6 and a pair of 811A's. After a bit of cleaning, the modulator worked fine. The RF deck needed some work, though and I added a bias supply to it. With 1250 VDC @ 280 mA I get about 250 watts output. The RF deck consists of a pair of 812A's, a B&W JTEL input turret and TVL plug-in coils. Not quite band switching, but almost! Over the 2000 holidays, I finished the transmitter!
My 1940 Station
Used this year for a few CW QSO's in the CX Contest
The 1941 transmitter using a pair of Taylor T-40's PP and an 807, 6L6 exciter is finished. It was featured in the March and November 1941 issues of Radio Magazine .
Here are some new pictures with a schematic from the March article.
A Hammarlund HQ-120X is on the top shelf for "Fone" & a National HRO5TA-1 is used for CW. A Thordarson table top speech amp is located on the far left of the transmitter. To the left of the HQ-120X is a BUD VFO-21 electron coupled oscillator. In the rack is a 1940/2000 home brew tx running a pair of Taylor T-40's modulated by TZ40's. Thordarson CHT iron weighs down the bottom of the rack! (A 1936 MacElroy bug, trim "cans" & a pre-war D-104 is on the desk.)
My workshop
Looks like a Ranger is getting the work-over!
I spend some of my "free time" working on gear for other people who are into vintage gear. Using old radios on the air is really fun, but only modern test equipment will keep them dependable!
If you need some repairs done, drop me an e-mail!
vri 73 Steve W8TOW
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Photographs on this page are copyrighted 2007-8, all rights reserved.
are prohibited.