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History of the manufacturer  

Grommes Precision Electronics, Inc.; Chicago (IL)

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Name: Grommes Precision Electronics, Inc.; Chicago (IL)    (USA)  
alternative name:
Precision Electronics Inc.
Abbreviation: grommes
Products: Model types Others

Began as a company that designed and manufactured signal tracers, William Grommes founded Grommes~Precision Electronics, Inc. in March of 1946.

After 52 years of operation in Franklin Park, Grommes~Precision has moved its facilities to Gurnee Illinois. 

1331 Estes Avenue, Gurnee, IL 60031
Local: 847-599-1799
FAX: 847-599-6178

Founded: 1946
The name "Grommes" was adopted specifically for Grommes~Precision Electronics Inc., line of consumer hi-fi products, lead by the chief engineer and audiophile, Al Hart. Grommes became a pioneer in high-fidelity with mono block tube amplifiers, pre-amplifiers, integrated amplifiers, stereo amplifiers and tuners... The demand for quality hi-fi amplifiers grew substantially and in 1952 Grommes~Precision moved its operations to Franklin Park, Illinois.

This manufacturer was suggested by Vitor Oliveira.

Some models:
Country Year Name 1st Tube Notes
USA  51 Super Tracer - VTVM 251   AM-FM and TV servicing. Trace signals from Antenna, RF, IF and AF stages. 
USA  51 201 Deluxe Signal Tracer   For all AM-FM and TV circuits. 20 cycles to over 300 mc. 
USA  56 GRT-1 6BK7A  Grommes model GRT-1 is an AC operated AM-FM superheterodyne tuner.   
USA  56 Flat Six 55C 12AX7  Four channel, 12-Watt amplifier. AC Operated 4 Channel Amplifier. 
USA  56 Pre-Amplifier 211 12AX7  Preamp-Equalizer, mono. 
USA  56 220-BA 12AU7  20-Watt basic amplifier, with Internal Impedance (= damping) control. 
USA  56 56-PG 12AX7  The Grommes Model 56PG is a AC Operated 12 Watt audio Amplifier. 
USA  56 Hi Fidelity Amplifier LJ-4 12AX7  10-Watt integrated amplifier, mono, with phono equalization Flat / RIAA / Old LP. 
USA  58 GRT-3 6BQ7A  Tuner only. The Precision Electronics Model Grommes GRT-3 is an AC operated 12 tube FM-AM ... 
USA  59 260A 12AU7  For speaker with 4, 8 or 16 ohms. 
USA  60 250-K 6L6GB  60 W Pout; for speaker with 4, 8 or 16 Ω. 
USA  59 209 ECC83  Stereo preamplifier.