I have for sale an Gertsch High-Frequency standard receiver model RHF-1. The unit is in good physical condition for its age but the only testing I have done was to power it on. As I turn the audio knob I do hear a noise from the speaker. It is being sold as/is since I don’t have the knowledge of testing it any further. I’ve included some specifications below.

What you see pictured is exactly what you will receive. I accept Paypal as payment and will ship out the same/ next business day. Super fast shipping every time! Buy with confidence from a reliable seller. Any questions feel free to ask and I will answer them as quickly as possible.

Features:

Rapid calibrations of frequencies with Bureau of Standards

Receives all 6 international stand frequency channels.

Crystal control of all frequencies

All transistorized circuitry

Operates from 115/230-VAC power line or 12 VDC battery

Output for oscilloscope comparisons

Description:

Here is an all transistorized, superheterodyne received designed for the reception of WWV, WWVH, or other International Frequency transmissions. The extreme sensitivity of this instrument permits reception of these standard frequency transmissions anywhere in the world.

Model RHF-1 provides a low-cost means of rapidly checking the calibration of oscillators and frequency standards to an accuracy of up to one part in 107. Other applications include: precision time measurements, receiving standard audio frequencies, pulse code modulation, and radio propragation notices transmitted at these frequencies.

The receiver operates from either a 115/230-volt, power line source, or a 12-volt battery. I.F. frequency, and band width are controlled with a ceramic filter. Output terminals on the rear of the chassis permit the connection of oscilloscopes, to observe beat frequencies.

Specifications:

Type: Single conversion, superheterodyne

Operating Frequencies: 2.5, 5, 10, 15, 20, and 25 megacycles

Usable Sensitivity: 1 microvolt

Selectivity: 4 kc wide, 6 dB down. 20 kc wide, 60 dB down

Image Rejection & Spurious Response:

2.5 mc to 15 mc: 50 dB

20 and 25 mc: 35 dB

A.G.C.: Output change less than 10 dB with input signal of 10 to 30,000 µV

Signal Plus Noise-to-Noise Ratio: Better than 10 dB (at 3 µv input)

Input Impedance: 52 ohms and high impedance

Audio Output: 100 mw for 3 microvolts input

Monitor Meter: Relative Signal strength and zero beat indication

Audio Filters: Panel switch selects 440, 600, and 1000 cycles

fx Input: BNC connector and attenuator on front panel

Oscilloscope Connections: Banana jacks located on rear of chassis for observation of beat frequency

Audio Output Impedance: 100 ohms approx. (terminals on front panel)

Power Requirements: 120/230 volts, 50/60 cycles at 2.5 VA, or 12 volts C at 120 milliamperes

Dimensions: 7.5" W x 3.5" H x 13" D.