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Vortexion amplifiers

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WATCH RELATED VIDEO: Vortexion demo

Vortexion S 30/50/3MG EL34 Valve Amplifier


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You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter cpaxton Start date Jul 16, Joined Aug 19, Messages 8.

Hi There! This is my first post to the forum It uses ef 86 valves 1 for each channel and a final output one. All channels are working, but there is a hum centred around Hz on the output. The hum is present without anything plugged into the input and also present with something plugged into the input. I have read on other forums that the unit itself should be pretty quiet if in good condition.

The capacitors that are used are the brand Hunts. I bought replacement capacitors and have replaced some starting at the output.

I was wondering do these units produce this hum always? I have checked the valves to see if they are microphonic and they seem to be in good condition. I can provide any pictures should anyone need them. Any help would be greatly appreciated. Cheers Conor. JohnRoberts Well-known member Staff member. I am not a tube guy, but first thing to check for a common problem is probably power supply.

Hi JR, Thanks for taking the time to reply. I will have a look. The power transformer seems to be In a screened box so I was hesitant to open it but, I know now I should. Cheers, Conor. The first step might be to look at the rail voltage for low ripple? But I repeat I am not a tube guy. PRR Well-known member. You already read that it shouldn't buzz. You want a second opinion? The internet is full of all opinions. Your wall-power is 50Hz AC. The rectifier makes DC with a Hz ripple.

So it is not the power transformer, or the individual stage except slightly. Find the rectifier and follow it toward the tubes. There will be some large roughly 33uFd V caps possibly several in one can. Replace those. Thanks for information PRR, I really appreciate it and will get straight on that.

Rob Flinn Well-known member. Replacing them should sort it. Tubetec Well-known member. Joined Nov 18, Messages 3, Some of the Vortexion units go back as far as the late Be carefull if you remove the mains transformer ,mark is so when you replace it the orientation remains as it was or otherwise you might just end up with even more hum. Check the rubber seals on the end of the power supply filter caps ,I'll bet these caps have vented and dried out any sign of leakage from the cap will be a telltale, in any case like the advice from the other guys replace all the electrolytics at very least in the power supply ,any others that look suspect ,replace them too.

I should have the schem for the Ef86 input stage around here somewhere ,I might have posted it here before. Probably some simple mods would need to be done to the input stage to make it more suitable for modern useage,in any case it will be a good exercise to bring it 'back to factory' specwise. Post a few pictures of the unit if you can. Attached is a crap quality scan of the circuit diagram sorry all I had on my pute , but you can get the gist of how it works.

Thanks to everybody so far for all the information. There is some solid gold here. I am currently on the 'Hunt' pun intended for some 33uF, four in total and 8uf single mains filtering capacitors. That is really interesting re: the input impedance of each preamp. Would that mean that the microphones intended to work with this box have even lower output impedance? I am definitely going to lookout for the brands of mics mentioned.

I have no real want to modify or replay the input traffos. I am quite find of some of Joe meek's recordings, in particular, 'The Cryin Shames: Please Stay', so i can pretend to myself that i will achieve such things with this preamp, hahaha! Rob Flinn, wow, thanks for the schematic! Personally I wouldn't touch nos electrolytics with a bargepole. I have the 3 channel version that has a PPM meter in place of the knob for channel 4.

Old-time caps started at 4uFd and went 8u 16u 32u At a later time the odd-numbers 32 64 etc were "rationalized" to 10u 20u 40u etc. Modern caps fall closer to their marked values. The original design was compromised by the high cost then of e-caps, and the fact that the mixer would be obsolete and set aside in 5 or 10 years; why spend a lot?

Make it just-good-enough. Now that you are finding life in the old box 50 years later, and e-cap prices are low until tariffs catch-up; even then , you may just up-size. Watch voltages, round-up on these also. If you are into "looks", it is a thing to hollow-out old caps and hide new smaller diameter ones inside.

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Front Panel Designer 6.


Introduction to Audio Frequency Triode Amplifiers

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Vortexion Wimbledon Vintage Valve Amplifier. Untested


Vortexion produced reel to reel tape recorders from to which were manufactured in United Kingdom. These tape recorders targeted the consumer market. The early models of Vortexion tape recorders used tube electronics and later on they transitioned to solid-state tape recorders. The company produced 2 track machines available in v voltages. Skip to content To. Company Description Submit New Info Vortexion produced reel to reel tape recorders from to which were manufactured in United Kingdom. You need to be logged in for this feature to work.

Vortexion 4/15/m

vortexion amplifiers

It's okay? We're in Liverpool, and it's skiffle. Even then, musicians were broke, but the vocalist had to be heard somehow above the guitars and screams and cat whistles. So the ubiquitous Grundig tape recorder was borrowed from home and set up on stage with a microphone. A four-watt amplifier could be made by switching the machine to 'record', and then pressing the 'pause' button.

The Vortexion C.

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This is a list of information we have gathered from a variety of sources on some of the major analog reel to reel tape recorder and related equipment manufacturers. While we have strived to provide the best information available to us, there will be corrections and additions. We include personal stories about the companies when they are provided to us. We always invite input on corrections and updates. Thank you!

Vortexion Reel to Reel Tape Recorders

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Vortexion Wimbledon Super 50 Valve Amplifier England In V 95% Excellent Cond | Consumer Electronics, Vintage Electronics, Vintage Audio & Video | eBay!

Vortexion valve amp

New Posts. Members Profile. Post Reply. Spotted this bit of nostalgia on ebay, not mine, but may interest some of the bottle junkies?

Vortexion 15w Push Pull 1960's - Vintage valve amp output transformer


I learned a bit about this company as a friend of mine mentioned it when I told him about my first Valve Amplifier It's funny, I have seen their stuff around but just can't remember where it was, maybe at school, it's solid stuff for sure. Not much help I'm afraid! Their factory was yards from where I lived up to the age of 8, the address was The Broadway, Wimbledon and they listed 5 amplifiers one tape deck and 1 mixer in the HiFi Yearbook.. Way back, they made Ferrograph tape decks made up for schools so were basically bombproof. Transtec Tarnsformers and Oxford Welders were also part of the same group.

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Voltexian Valve Amp?

For all brands and models such as vortexion reel to reel recorder. Regardless where purchased, our qualified technicians offer specialised non-warranty vortexion Audio Hi-Fi Equipment repairs. We have the expertise to help and fix any Audio Hi-Fi Equipment made by vortexion around haverfordwest. Almost every reel to reel recorder Speaker, Amplifier Repair haverfordwest is processed within three to five working days while also offering an express service for all Audio Hi-Fi Equipments. We provide a free prepaid post label for any vortexion Repair around haverfordwest.

History of the manufacturer

Mint condition from smoke free house natural epiphone casino. Zero marks and in showroom condition. Also comes with original white scratch plate and a gig bag can be provided.




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