NIKKO GAMMA 1 FM TUNER This tuner works absolutely works great. It attracts distant stations. It sounds beautiful.All of the lamps including the stereo beacon WORK.This is a massive 12.5#, well built, well designed tuner. From FM tuner info:Nikko Gamma I (1977, $400, black w/matching amp, silver, service manual, schematic, Audio review) search eBay The Gamma I is a 5-gang, FM-only, rack-mount style analog tuner that was sold in black and silver. It uses one LC filter and one SAW (surface acoustic wave) filter in the wide IF bandwidth mode, and 4 standard 3-pin ceramic filters in narrow mode, and has what some feel is a particularly effective high-blend circuit. Our panelist Bob says, The Gamma I has been praised by two people I trust. It uses the HA11223W MPX chip, same as the Gamma V. Looks tough to mod, with one board above the other, but not impossible. Looks to be discrete outputs also. Our contributor Hank adds that the Gamma I has a fundamentally sound design. I have not yet had mine modified but it has been restored (all marginal or suspicious parts replaced) and aligned. It is a very nice tuner and I suspect that it has significant potential for improvement.Our panelist JohnC did indeed improve his Gamma I, twice no less! Heres Johns initial report: These units sound pretty good as is, but they do respond well to simple mods. I did these without benefit of a schematic. The power supply is easy to get to just by removing the covers, so that got recapped. Bob said looks to be discrete outputs also, which I read to mean discrete components, but there are definitely op-amps in there. To be specific, TA7136P ICs are used, the same as what are in the Sansui TU-9900. I did manage to identify the input and output caps to the op-amps and changed those out, but without a schematic Ive stopped there for now. The IF strip is located on its own board located above the main board and prevents full access without removing it, not a simple task bet definitely doable. What was interesting was that this unit did not have the SAW filter installed in Wide mode. The LC was there but the SAW was replaced with a 3-legged ceramic Murata, tan body, yellow dot, marked E10.7A with the Murata logo and a stylized X on the next line. This appears to be a factory change because I can see no indications that the SAW was ever installed. Anybody else ever see this? Bottom line is that after a little tweaking these units sound real nice, reasonably selective and sensitive, at least in my market.But wait, theres more! John got hold of a service manual (now linked above) and went back inside. The tuner has a 5-gang analog front end employing two MOSFETs which feed dedicated Wide/Narrow IF strips. The narrow strip employs 4 ceramic filters, blue body/red left color dot MM-A series, the Wide an LC filter and a SAW. I received this one with the SAW replaced with what I believe is a 175 kHz, tan body/yellow center dot CF with no other circuit changes noted. The IF feeds an HA11211 FM/AM system IC with only the FM side used. It feeds a TA7061AP IC and then into a ratio detector. The HA11211 does contain a quadrature detector but it is not used. The MPX IC is the venerable HA11223 out to TA7136P op-amps. There are both fixed and variable outputs, with the variables running through about 28 inches of wire. The fixed RCAs are tied directly to board trace and are close to the op-amps. The power supply provides balanced 13V and single-sided 12V rails. The audio TA7136 op-amps are operated in balanced mode, while all other ICs are run single-sided.

This Nikko Gamma 1 tuner is a reliable and high-quality device for all your FM radio needs. With its sleek black exterior and rack mountable design, it is both stylish and practical. Its stereo L/R RCA audio outputs ensure top-notch sound quality, and it has been thoroughly tested and confirmed to be in working order. This tuner is perfect for anyone looking to upgrade their home audio system or simply add a new piece to their collection. Its brand name Nikko is synonymous with quality, and its model Gamma 1 is a top choice for FM radio enthusiasts. Get your hands on this tuner today and experience the great sound it has to offer.

This Nikko Gamma 1 tuner is a reliable and high-quality device for all your FM radio needs. With its sleek black exterior and rack mountable design, it is both stylish and practical. Its stereo L/R RCA audio outputs ensure top-notch sound quality, and it has been thoroughly tested and confirmed to be in working order. This tuner is perfect for anyone looking to upgrade their home audio system or simply add a new piece to their collection. Its brand name Nikko is synonymous with quality, and its model Gamma 1 is a top choice for FM radio enthusiasts. Get your hands on this tuner today and experience the great sound it has to offer.

Item in in good cosmetic condition.Unit powers on .I have no way of testing any of the functions.Tuner knob missing.Please see photos for questions concerning condition.

Nikko Gamma 1 FM Tuner TESTED GOOD RACKMOUNT FAST SHIPPING Tested an Works Great. . Fast shipping. See photos. Sold as is . SpecificationsType: Mono/Stereo TunerTuning Bands: FMTuning Scale: AnalogueFM Tuning Range: 87.4 to 109 MHzSensitivity: 1.6uV (FM)Signal to Noise Ratio: 75dB (FM)Distortion: 0.08% (FM)Selectivity: 80dB (FM)Output: 750mV

Excellent condition

This auction features a highly regarded Nikko Gamma I FM Stereo Tuner from 1977 in need of repair. This tuner was tested and everything works and functions including stereo reception and wide/narrow settings but produces no audio. The FM Det and Multipath outputs do produce audio but not the main outputs. I dont know what the problem could be, maybe a resistor or bad capacitor in the output circuit, not sure. This tuner features a heavy and solid build with many of the features and performance found in tuners that sell for 3X as much. The Gamma I sold for $400 in 1977 which amounts to $2,000 in todays dollars with inflation which was far from cheap for a FM only tuner in those years. It features great FM sensitivity and selectivity with 5 tuning gangs, mosfet Wide and Narrow mode options. Cosmetics are very good. Theres the usual scratches on the top from stacking components but a relatively clean face. A great candidate for refurbishing and restoration. If you know how to fix electronics and you are in the market for a solid built tuner that offers great looks without braking the bank this auction is for you. Sold As Is for parts or repair only. Make this tuner yours with BIN before its gone. I pack and ship fast to ensure a positive shopping experience every time. Thank you for your business and have a great day!!

This auction features a great sounding and highly regarded Nikko Gamma I FM Stereo Tuner from 1977. This tuner features a heavy and solid build with many of the features and performance found in tuners that sell for 3X as much. The Gamma I sold for $400 in 1977 which amounts to $2,000 in todays dollars with inflation which was far from cheap for a FM only tuner in those years. What this tuner lacks in eye candy and glamour it more than makes up in performace. It features great FM sensitivity and selectivity with 5 tuning gangs, mosfet Wide and Narrow mode options and fixed/variable output control. The sound can best be described as delightfully smooth. It delivers great stereo imaging, thick bottom end and silky smooth highs. It rivals some of the best tuners I have owned ( and Ive owned many, including the famous Marantz 10B) and it does it at a very affordable price. The Gamma I is well regarded at FM tuner reviews and recommended by Leonard Feldman in a 1979 publication of Audio Feview Magazine. This tuner is is great working condition, all lamps, indicators, meters and switches are in good working order. The tuning capacitor and volume controls were cleaned for noise and static free performance. Cosmetics are very good. Theres the usual scratches on the top from stacking components but a relatively clean face with some minor nicks that were touched up for better presentation. If you are in the market for a solid built tuner that delivers the goods without braking the bank this auction is for you. Make this tuner yours with BIN before its gone. I pack and ship fast to ensure a positive shopping experience every time. Thank you for your business and have a great day!!