Fisher 500c output tubes

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August undefined, 2024

WebNov 4, 2024 · I also modified the bias supply, changing out the original capacitor and selenium rectifier and adding a bias adjust potentiometer, reducing the output tube control grid resistors from 330kΩ to 220kΩ and changing the four coupling capacitors feeding the output tube grids from 0.047µF to 0.068µF. WebFeb 18, 2024 · If you can install 1-ohm resistors on pin 5 of each of the 4 output tubes, you can measure the current by connecting a digital meter on the VDC setting. 1-ohm resistors give you the luxury of not having to do math to get the current in mA as with 1-ohm resistors the ratio of VDC to mA is 1:1.

Fisher 500c rebuild - Philco radio

WebDescription. The 400 closely resembles the Fisher 500 and 800 series receivers, with a brushed metal faceplate and brass-faced knobs. Left of the dial is the famous Fisher bird logo, with a musical note in its beak. The … http://www.bwstube.com/fisher-500c--800c-amplifier-upgrades.html trust name on checks

Fisher 500-C vintage stereo receiver Page 2 Stereophile.com

WebThis Gold-Level restored Fisher 500C is an excellent tube receiver. After a comprehensive expert restoration, the looks and performance are simply stunning. ... Driver balance and … WebPost subject: fisher 500C upgrade. Posted: May Thu 17, 2012 12:43 pm . Member: Joined: Aug Tue 10, 2010 2:36 am ... 10 ohm resistors in series with each output tube cathode, adjustments to the bias supply to set correct idling current for the output stages, and replacing the grid coupling capacitors to the output stages. WebMay 16, 2012 · SOLD! Vintage Fisher 500C Receiver with New Output Tubes $575 SOLD! SOLD! The Fisher 500C may be the best sounding vacuum tube receiver ever made. … philips airfryer xxl hd9650/99

FISHER 400 vs. today

WebI recently picked up an original owner 500C Fisher receiver, complete with owner's manual and schematic manual. This old guy bought it in 1963. It has no sound output. It needs new output tubes- 2 of them test bad, one questionable. Only one tests good. All the tubes light up- and all other tubes test good. Problem is WebOne important design aspect that may explain some of the 500C's superiority can be measured with a ruler. Both the power and output transformers are larger on the 500C than on the 800B or 400. Its plate stacks measure 2 7/8" for the power transformer and 2 1/2" for the output transformers. philips airfryer xxl hd9650/90 onderdelenWebFisher 500B, 500C and 800C. Cayuga Posts: 480. ... As probably you already know, the 800C is Fisher's "pinnacle" product, but only different from the 500C because it has AM and FM instead of FM only. ... "AM-FM [simulcast] stereo" receiver used small output tubes (either EL84 or 7189) and used vacuum tube rectification for its HV. I'd love to ... philips airfryer xxl hd 9870/20

"WebSep 25, 2012 · It weighs in at over 40 pounds and measures 5-1/2″ x 16″ x 16″. It uses the following tubes: 4-7591 output, 2-6DS4, 3-6AU6, 6SC6, 6EA8, 3-12AU7, 12AX7. If you’re looking at a Fisher 500C or McIntosh … " - Fisher 500c output tubes

Fisher 500c output tubes

Fisher 500C with JJ 7591S - Optimum Bias Current? diyAudio

WebThe Fisher 500C is a world class vintage piece, with excellent build quality and audio performance. I have been working on these units for many years The photographs shown here are of my personal 500C, which I have … WebFisher 500-C vintage stereo receiver Specifications. Description: Two-channel FM receiver. Tube complement: seven 12AX7 (phono, tone control, phase inverter stages); four 7591 …

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WebOct 24, 2024 · The Fisher 500-C features a full function pre-amplifier section with twin phono inputs, auxiliary input, monitor input and tape input (for direct connection to the tape head). The Tuner section features a … WebFisher 800 B Bias Variations with Output Power and Harmonic Distortion Measurements ElPaso TubeAmps 16.6K subscribers 19K views 12 years ago The purpose of this video is to explore and document...

WebFig.5 Fisher 500-C, Aux input channel separation (10dB/vertical div., R–L dashed). With its pair of 7591A output tubes per channel, the 500-C offers a reasonable amount of power, provided the load is close to the nominal … WebMar 10, 2016 · 28. I am currently having a 500C refurbished that I recently purchased. The tubes that were in it almost all need to be replaced. The 4 output tubes were all …

WebOct 16, 2001 · A new matched quad of larger 7591A Electro-Harmonix output tubes are only $88. (fit 500-C & 800-C, not 400) 12AX7 & 12AT7 tube upgrades are only $10 each. There are 9 of them in each receiver! MODS & UPGRADES. TONE/LOUDNESS BYPASS for unbelievable wide-open tone! Only $65 more. Can anyone here decribe the pros/cons … http://www.audioreview.com/product/amplification/receivers/fisher/500c.html

WebSep 19, 2024 · Specifically 4 new output tubes, the 7591's. ... The service technician is confusing the 7868 tubes the Fisher 400 uses for the 7591. None of the modern production 7591 made today have a pin size issue like the 7868. There is one modern 7591 that has a really large glass bottle size both tall and fat. ... I haven't rolled through power tubes on ...

WebJan 3, 2010 · Fisher 500C (phono low, phono high) ? Discussion in 'Tube Audio' started by the_nines, ... If your MC cart is relatively high output for an MC, you may be able to make it work. 2. To facilitate making it work, if you use very high gain preamp tubes in the phono positions, that'll help. So, those two tubes with the tube shields? ... philips airfryer xxl hd9654 philips airfryer xxl hd9654/90WebApr 18, 2024 · Get the 500c checked out. Selenium rectifier should be replaced and all the caps if not most. If it’s sat for awhile, it’ll be a bomb waiting to blow. Absolutely, these old Fishers need a complete rebuilding including the power supplies, rectifiers and coupling caps. Check resistors for going out of tolerance too. allied333, Apr 17, 2024 #8 philips airfryer xxl hd9867WebAEA Signature Fisher 500-C. The ultimate vintage tube receiver. AEA custom restores the Fisher 500-C into a modern, extreme high-end amplifier. We source excellent condition core receivers and perform a … trust name change upon death of grantorWebWith its pair of 7591A output tubes per channel, the 500-C offers a reasonable amount of power, provided the load is close to the nominal value of the output transformer tap. Fig.6 plots the receiver's THD+noise percentage against output power into 4, 8, and 16 ohms. philips airfryer xxl hd9952/00WebApr 1, 2024 · Some feel that the Sansui 1000A is the best sounding tube receiver ever made. That’s saying a lot when comparing it to the popular Fisher 500C or 800C. Nonetheless, it definitely performs to high standards which means it is also in high demand. Run of the mill working units sell for around $500 while fully restored units can sell for … philips airfryer xxl instrukcja obsługiWebJun 25, 2024 · Fisher was actually the first manufacturer to offer audio separates; McIntosh, Marantz, H.H. Scott, and Harmon Kardon would eventually do the same. “The Fisher” … philips airfryer xxl istruzioni