W2UOL, Mr. Donald Merten, located his Eldico Company in Douglaston (Queens) L.I. N.Y. in the late 1940s. His Eldico TR1 was an open dual-chassis rig--power supply (2x866A) on one chassis; audio and RF on the other. It was meant to be run on a table side by side out in the open
This was shortly before TVI became a big problem for hams. The parts are indeed of high quality from a day when nearly everything in radio was of relatively high quality, so it is nice to have the components on "display," such as the Raytheon filter choke in the power supply, the 866As, and the 813. The business philosophy of Eldico seems to have been to provide hams on a limited post-WW2 budget, a means of getting on phone with a fairly powerful transmitter. Eldico also owned another business called Surplus Radio, which may have been the source for some of the TR-1 parts such as the modulation transformer.
Modulator 2 x 811A; RF single 813 plate and screen modulated class C. Mod iron ART13. 1.5 KV B+ modulator and RF. This rig was sold as a kit in 1949 for $179. Bands: 80, 40, 20, 15, 11, 10 m. Link coupled output with B&W TVL plug-in coils and B&W butterfly air variable cap. Eldico advertised 300 w. input on phone. This is (to me at least) an extremely interesting design.
Copies of the manual are available from Pete WA2CWA d.b.a. manualman.com, but the manual lacks the schematic. It turns out the schematic is a large "blueprint" style sheet measuring around 2' x 3'.
Thanks to the effort of Al W1VTP who kindly photographed his schematic and sent it as a pretty clear .jpg file, I have with his permission put this up on the web. This is especially noteworthy since Al is in the middle of moving. This is real AMer style support and cooperation.
John K2TQN did some contrast enhancement and sent that result to me as well.
Unfortunately the current files are difficult to print out on a regular typing paper size printer but viewing on a monitor screen is not too bad (and sure beats no schematic at all). Al's file gives the original look which I like but in cases where higher contrast is needed John's .jpg version helps.
I find the rig's design elegant and a possible basis for a homebrew effort if an actual TR-1 is not available. N.B. The TR-1 is different from the 1953 TR-1TV, which used a 5-125 PA in a cabinet with a different power supply and output tank.
This is a great supplement for the TR1 manual reproduction. Links for the two files below:
W1VTP original: http://home.fnal.gov/~atkinson/TR1/TR-1schematic.jpg
K2TQN contrast enhanced: http://home.fnal.gov/~atkinson/TR1/TR-1schematic-enhanced.jpg
UPDATE 2011-03-11: I have converted the schematic jpeg files to pdf:
W1VTP original: http://home.fnal.gov/~atkinson/TR1/TR-1schematic.pdf
K2TQN contrast enhanced: http://home.fnal.gov/~atkinson/TR1/TR-1schematic-enhanced.pdf
Photos of the rig and supply:
Rig: http://home.fnal.gov/~atkinson/TR1/TR-1rf.jpg http://home.fnal.gov/~atkinson/TR1/TR-1rf2.jpg