download the 4pp circa 1950 Gray Research sales flier for the model 103-LP Transcription Arm and the model 602 disc equalizer:
Gray was located in Hartford, CT, just a stone’s throw from here, from roughly 1950 through 1970. feel free to correct me if you personally know otherwise. I have come across very little original Gray literature and equipment in my 13 years here.
There seems to be very little information on the internet about this company, other than this nice archive.
If you or a family member worked at Gray, please drop us a line.
Download a 3pp article from B.E , 1965, on the subject of wireless microphones used for broadcast reporting. Author is R Fetterman. BTW: is that a large collection of RCA OP-7’s pictured above?
From BROADCAST ENGINEERING Mag, circa 1964, plans by one Robert Tiffany on the design and construction of a low-cost ‘standby’ broadcast console. Output amp stage uses my fav line output transformer, the UTC A-25: still unequaled among air-gapped plate:line transformers for low-frequency response. BTW, add a 600:60K mic input transformer to the front of this thing and you’ve got a pretty nice mic preamp with a LOT of gain.
From Collins Radio 1974 catalog #74: A round-up of broadcast compressors from Collins and CBS. Models covered: Collins 26U-3 limiter, 26J-3 compression amplifier, CBS 4100, 4450A. and 4110, 4000A limiters; CBS 4500 dynamic presence equalizer; and CBS 710 ‘automatic loudness controller,’ which I imagine is some sort of LFKS-type limiter?
Also – a bonus – from the same era – second-hand limiter/pre-amp price list from the same era. RCA BA2Cs for $20? Yes I will take 30 please. How about a General Electric BA-5 for $75?
Big scans so… follow the link for the info…
Continue reading Broadcast Compressors etc. Circa 1974