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FWIW, the 5879 was a low noise tube used in many low level audio amplifiers, often as a microphone pre-amp. Dates around the mid 1950s or later. -- Richard Knoppow Los Angeles WB6KBL SKCC 19998

Hi Mark, That looks like FAA Air Traffic Control recording system equipment for sure, probably the predecessor to the system I had some years ago. Built rugged and I wouldn’t be surprised if some

Oh, I see I mis-typed the id of the preamp tubes, should be 5879's not 5789.? -Mark

Hi Steve, Yes, I'll add some more pictures below. The tape unit, denoted as a Dictaphone Multi Chanel Reproducer was a two channel recorder, photo of nameplate below. The Amplifier, ID'd as Reproducer

More pictures would be helpful. I suspect it is an audio amp used in systems for recording and reproducing aviation over-the-air communications. At one time I had several large reel-to-reel tape

Looking for any information related to this unit. The photo is of the attached nameplate. I have been unsuccessful so far in finding anything abojut this unit.? Thank You. 73

This is an 18 kW 3 phase 45-512 Hz ac power source. The full model number is FCS18-3PT-HV3-MODE-OR-PRC-704 Unit said to be working except for some wonkiness on one of the output phases. California

Hi all Does anybody have a complete manual set for the Murch Ultimate Transmatch, AKA UT-2000-A, as an online file? BAMA has a partial set, and there’s a partial copy in the ARRL Handbook. But

Looking for Sencore VC63 and NT64 manuals.

Alamogordo Amateur Radio Club 开云体育 Hams In The Tularosa Basin And Around The World And Beyond AARCs' 38th Annual Hamfest 31 Aug Labor Day Weekend 2024 from 7am to 3pm-ish (depends upon

Thanks, I found the user manuals for the C and B revision already, but I'm looking for the calibration procedure which is a separate document and not included in the user manual. I contacted Amprobe

https://www.amprobe.com/wp-content/uploads/2019/12/HD160C_Digital-Multimeter_Manual.pdf Check with them maybe have the b versoin (

Hello, I'm looking for the Meterman / Amprobe HD160B multimeter calibration procedure. Also if anyone has the service manual I would also be interested. Thanks,

All, Does anyone have a datasheet, Operating, or Service Manual for the Anritsu MS68A spectrum analyzer? Haven't found anything while checking the many manual sites. Anritsu, Japan noted that support

Hi All, looking for a service manual for GME tx5000/TX5000r if anyone has one. Also manual or at least schematic? for TOKKI JC-100V 2m linar amplifier. Appreciate any help wayne VK2WDE

The is no service manual for the 2945 on K04BB's site, There is a 2945A service manual, but the 2945 and 2945A are NOT the same. G Edmonds

I cannot find any documentation for this thing and I'd love to get it calibrated. I would not have thought this meter is some rare gem.

On? KO4BB are the service manuals . I have a 2945 myself. Only once I had a problem with the set. An OMxxx IC was defective. Jos PA0AMX

Why are you asking here? Try /g/Marconi-Test-Instruments G Edmonds

Does it pass its self test ? 73 john Sent from the all new AOL app for iOS