Futterman H3 OTL ldsound.ru (1) ldsound.info
3. What about 6 JJ Tesla EL509's per channel? Current wise that will match the 6FW5's since they have a max of 550mA and the JJ's are 500mA. 6 replaced by 6 does not cause me a transformer issue. The 6FW5's are octal as are the JJ's.
Julius Futterman H3 OTL made by Tech Instruments Corp. under license Tube Audiogon
CHERYL S FUTTERMAN, PhD - NPI #1952479990 Psychologist. NPI Profile for Dr CHERYL S FUTTERMAN in MILLBURN, NJ.. A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of.
Futterman H3AA OTL tube amp classic, restored and rare SALE PENDING Photo 2592468 Aussie
The difference between an H3 and H3a is that Futterman used one single very large electrolytic capacitor to couple the output to the speaker, in the H3. In the H3a, he went to using a gaggle of physically smaller photoflash capacitors, which were the fastest available in his day.
Futterman H3aa Otl Mono Amplifiers Tube Audiogon
Extremely rare Futterman (Harvard Electronics) H3 OTL Stereo Power Amplifier. First owner and in very good condition. Acquired in 1980 and rarely used only by the owner. Julius Futterman himself modified this unit and put date and his signature on the underside of the transformer. (see picture)
Futterman H3AA OTL tube amp classic, restored and rare Photo 2592469 US Audio Mart
Futterman H3. Thread starter rdiiorio; Start date Jul 18, 2022; Tags futterman h3 rdiiorio New Member. Jul 18, 2022 #1. Show your OTL Tube Amplifiers ! tubelectron; Jul 4, 2022; Tube Audio; 2 3. Replies 41 Views 3K. May 14, 2023. tubelectron. T. Harvard (Futterman) OTL H3 w/ 6 6FW5 Tubes / Channel.
Futterman H3AA OTL monoblocks. All new output tubes. All new caps. Ready for the next 50 years
The NYAL OTL-3 and the Prodigy P3 OTL are pretty much the same amps circuit wise except for a few minor changes. The only thing that strikes me as strange is that the P3 schematic I have shows considerablly lower running voltages then the original Futterman h-3 schematic using say 6FW5's of 6BH5's.
Futterman (Harvard Electronics) H3 OTL Power Amp Audio Asylum Trader
Futterman OTL mono tube amps, pair Listing ID: lisafbhg Classified Listed February 8, 2022 2:59pm · 461 Views michaelbrenden member since November 2020 1 Watcher Items from this seller This listing has ended. Listings Similar to Futterman VAS Industries Citation Sound 2 $3,000.00 Allnic Audio A-2000 SE Stereo Tube Power Amplifier; (5. $4,899.00
Futterman H3 OTL ldsound.ru (5) ldsound.info
Futterman H3 OTL 0 Members and 1 Guest are viewing this topic. Read 1227 times. hifibuff. Jr. Member; Posts: 42; Futterman H3 OTL « on: 22 Jul 2019, 07:33 am.
Винтажный ламповый усилитель Futterman H3 OTL YouTube
- Sep 27, 2019 futterman H3AA mono blocks Audiogon $3,000 Jun 2, 2015 - Jun 4, 2015 Futterman H 3 C OTL Röhrenverstärker Kleinanzeigen €2,350 Mar 7, 2017 - Apr 12, 2017 Futterman h3aa mono blocks AudioAsylum $3,000 Apr 20, 2015 - Jul 18, 2015
Futterman (Harvard Electronics) H3 OTL Power Amp Audio Asylum Trader
Futterman H-3A power amplifier Specifications Sidebar: Specifications Description: All-tube output-transformer-less stereo power amplifier. Output: 90Wpc with 16-ohm load. Frequency response: 5Hz-90kHz, +0, -0.5dB; -3dB at 200kHz. IM distortion: <0.05% at 90W (continuous sinewave) into 16 ohms. Damping factor: 200.
Futterman H3AA OTL tube amp classic, restored and rare SALE PENDING Photo 2592472 UK Audio Mart
The Futterman H-3 was one of Julius Futterman's first commercially produced (OTL) amplifiers, marketed under the name of Harvard Electronics. Hand-made by Futterman in small numbers, these highly prized collectors items are quite rare today and insufficient data is available to place a current value on them.
Futterman (Harvard Electronics) H3 OTL Power Amp Audio Asylum Trader
Details Hi-Fi equipment Power type and voltage Alternating Current supply (AC) / 110-125 Volt Loudspeaker - This model requires external speaker (s). Power out 100 W (undistorted) Material
FUTTERMAN H3 オリジナルOTLパワーアンプ入荷しました・・ 無限堂会長の公開日誌｜厨房、事務、工具の中古屋
Futterman H3 OTL Julius Futterman was the first to realize the dream of a commercial output-transformerless tube amplifier, albeit for a brief period. Its life span was extended for a few more years by New York Audio Labs. Dynaco ST-70
Futterman (Harvard Electronics) H3 OTL Power Amp Audio Asylum Trader
Today I heard a Futterman OTL powering a pair of Quad ESL57s. The Futterman has been recently serviced and is in nice shape.. Futterman OTLs are the Holy Grail of tube amplifiers! I have three. A Harvard Music H3 using four 6HB5's per channel and a pair of H3aa's using six 6LF6's per mono amp. I have two pairs of Quad 57's and a pair of KLH.
RARE PAIR of ORIGINAL Julius Futterman model H3AA OTL amplifiers Stereo pair, 1 owner, S/Ns 58
The Futterman OTL-1 can provide 150W into a 16 ohm load, 65W into an 8 ohm load, and 35W into a 4 ohm load; it's effectively current-limited into loads below 16 ohms, but this is nevertheless an extraordinary amount of power for an OTL amplifier.
Futterman H3 Futterman H3
[ Alert Moderator ] Bringing up Futterman H3 with OA2 and 5651 tubes ??? Posted by rogerh113 (A) on December 19, 2023 at 15:35:28 Hello, I am ready to bring up my rewired Futterman H3. I have used a variac to bring up the amp without tubes to check the transformer and power regulation capacitors. All seems fine.
