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Oscillator 204D Equipment Hewlett-Packard, HP; Palo Alto ...
https://www.radiomuseum.org/r/hewlett_pa_oscillator_204d.html
Model: Oscillator 204D - Hewlett-Packard, HP; Palo Alto. Shape. Tablemodel, with any shape - general. Dimensions (WHD) 155 x 130 x 203 mm / 6.1 x 5.1 x 8 inch. Notes. Wide frequency range 5Hz to 1,2 MHz. Low distortion. High amplitude …
HP 204D Oscillator - Oscillators and Crystals - BMI Surplus
https://www.bmisurplus.com/product/hp-204d-oscillator/
Hewlett Packard 204D Oscillator – Frequency Range: 5 Hz to 1.2 MHz – Output Impedance: 600 ohms – Input: 115 or 230 VAC ***MPN 204D …
hp 204d - Page 1 - EEVblog
https://www.eevblog.com/forum/testgear/hp-204d/
Has anyone got experience with this 204d oscillator. I was give this 204d and a hp power supply 0 to 3o v at 3 amps and a tek 2235 scope. ive got the scope and the power supply working great but the 204d is giving me trouble. It was clean but dosenot work.
Audio & Test Oscillator - HP Memory Project
http://www.hpmemoryproject.org/wb_pages/wall_b_page_10a.htm
...The HP 204C Oscillator . The 204C is described in the December 1968 issue of the Hewlett Packard Journal as a Low-Cost, General-Purpose Oscillator with Low Distortion and High Stability. Output of the HP Model 204C is a sine wave from 5 Hz to 1 .2 MHz in six overlapping bands. The amplitude is 5 V rms open circuit with a 600 ohm output ...
Keeping old equipment alive - EDN
https://www.edn.com/keeping-old-equipment-alive/
A few weeks ago I fired up an old HP 204D audio oscillator and found that it wasn’t working anymore. Instead of a clean sine wave, I was getting sinusoidal bursts with a 60 Hz repetition rate. Oh, power supply failed, I thought to myself. I opened the unit up and couldn’t see anything obvious. A search of the Internet yielded a copy of the ...
HP 204B Audio Oscillator - prc68.com
https://prc68.com/I/HP204.shtml
HP History The first HP patent was for an audio oscillator (200A) and made use of a pilot lamp as a stabilizing element. 2016: I received an inquiry about a Bell System Technical Journal article Bridge Stabilized Oscillator by L.A. Meacham, presented June 6, 1938, published Proc I.R.E. Oct 1938.
HP 204C audio oscillator power supply - Antique Radios
https://www.antiqueradios.com/forums/viewtopic.php?t=172441
Member. Joined: Jan Thu 01, 1970 1:00 am. Posts: 644. Location: Houston TX. I recently purchased an HP 204C audio oscillator, with option 02 (battery power), and I need some help with the power supply. I have attached a "cleaned up" schematic of the power supply, which supplies +/- 13 v. to the main board. The orange dotted connection to the ...
Audio Oscillators – Fair Radio Sales
http://fairradio.com/catalog/category/alphabetical-category-listing/audio-oscillators/
AUDIO OSCILLATOR AC line or rechargeable battery operation makes this instrument ideal for both field and laboratory use. The unit provides frequency from 5 Hz to 1.2 MHz in six overlapping ranges with a flatness of +/- 0.5% ( from 100 Hz to 300 KHz ). Delivers an output voltage of >2.5 V-rms ( 10 mW or +10 DBM ) into 600 ohm.
Hewlett-Packard 209A 4Hz-2MHz Audio Oscillator
https://www.kenrockwell.com/audio/hp/209a.htm
The Hewlett-Packard HP 209A is probably the world's most useful and versatile general-purpose audio oscillator. You'd be hard pressed to pay more than $100 for it at eBay (see How to Win at eBay).. The 209A stands out because it's small, light, simple to operate, and most importantly, sweeps directly and precisely across the right ranges for audio with a minimum of band …
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