I have asked James to update my explanations on the service manual pages to reflect this, but he hasn't gotten to it yet. The vibrato sounded so bad that I modified the circuit to match the "2nd version" schematic. It has a few design bugs (it works, but the stereo vibrato effect has too much overlap in the transitions from channel to channel due to the oscillator design and LDR config). I originally thought the "1st version" Haigler did not really exist since I had never seen one. I have seen and repaired all of these preamps, so I know they exist and the schematics are correct. It is indeed a lower noise design than the Haigler, but the vibrato circuit is different yet again. "Low Noise" Preamp designed by Paul Gagon with rotary controls and pushbutton for vibrato on/off. "2nd version" 5 pin Haigler amp, but with black faceplate to match Mark II stage piano. Silver faceplate for preamp looks like Mark 1. "2nd version" 5 Pin stereo amp designed by Bob Haigler at Fender, nicknamed "Haigler" amp. I’ll get a string tuned just right, and then it drifts a couple cents out of tune as soon as I let go of the tuning knob. "1st version" 5-pin stereo Haigler Preamp with EQ sliders as printed in the Service Manual. We haveprovided calibrationmarks for easy tuning toA440, A442or A435 standardpitches. 7 I recently started using Peterson’s iStroboSoft strobe tuner app to tune my guitars, and Im running into a couple of common problems, especially when tuning my Fender Standard Precision Bass. Anything else is a modification or a changeout / replacement.Īs far as I know right now, the following is correct: Same 5pin Haigler amp, but with updated preamp with all knobs and no encasement for preamp.īasically, all 4pin amps have silver grill with 3 knob preamp, and 5 pin amps have black grill with EQ sliders. Same 5 pin Haigler amp, but with black faceplate to match Mark II stage piano. Fender badge up until beginning of 1975, Rhodes badge for 1975-1984.ĥ Pin stereo amp designed by Bob Haigler at Fender, nicknamed "Haigler" amp. It should also be noted there are about 3 different phases/configurations of updates on the peterson amp from 69-1977. Same Peterson stereo amp but with 4pin round connector. Suitcase piano with 4 pin square-end stereo Peterson amp. Fender Badge.ġ970-mid 1973 (mark I is actually the name of stage piano not overall vintage) Silvertop with 4pin stereo amp by Peterson strobe tuners, nicknamed Peterson amp. Silvertop with Mono Amp (by Jordan electronics company) Mono tremolo. Same goes for Fender amps I believe, everything after 1965 was covered in Black tolex. There are no brown tolex Rhodes, except for Piano Basses before 1965 and possible prototypes.
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