valve

If anyone has experience with selling valve era gear to China, could they please private message me? I'm in the middle of something "complicated" and would very much appreciate advice from someone more knowledgeable.

I've retrieved my old Armstrong PCU25/A20 pre/power amplifier pair from the attic, where they've been since 1996 (and the purchase of the big Sugden). They were my only amplifier between 1984 and 1996 (they were bought for fun from a antique(junk) shop, but turned out to be nicer than my Rotel...

I have accumulated boxes of valves over the years (some from auctions etc) for no good reason. I would like to slowly sell them all off - but before doing so would like to test them so the buyer is assured (and I am assured) that the valves are in good shape. If anyone has a working and...

Hi All - Long time lurker, first time poster. Thanks for all the great hifi wisdom on this forum from over the years! I picked up this amplifier today. I can't see anything about the brand online and don't really know what this is. Does anybody have any information about it perhaps? Thanks...

Audio Note DAC One, non over sampling DAC with valve output stage for sale. In good condition, tiny dink in from facia, and small amount of surface rust around screws on rear panel. I am able to demo. I do not have the original packaging. I am located in Keynsham near Bristol and Bath. Buyer...

Hello, currently I own a pair of Living Voice R3R. They can sound pretty good with music witch isn't that demanding and complex like Jazz, Singer Songwriter and so on but with Rock, Punkrock and other artificial music I have the feeling that there is something missing sometimes. I'm curious to...

Hello, a friend of mine is having issues sourcing a Transformer for a repair. It's a 2x150V 35mADC (doubler), 6.3V 3Arms. I know the obvious answer is to go back to Bottlehead, but if this can be sourced from UK/EU he'd be very, very grateful for the info. Pictures of the offending item...

Hi, The link below is in reference to three video workshops where : This workshop on tube or valve audio amplifier design in three parts is presented by Menno van der Veen, MSc, a world-renowned specialist of valve amplifier design. He presents techniques for enhancing valve or tube amplifiers...

Yours, for a donation to be split between PFM and Arthritis Research - a pair of full range speakers. This is the blurb from eBay, where I did have them listed: Wharfedale Super 10 Gold Edition drivers - these appear to be the later model with "Whizzer Cones". The speakers appear to have been...

Is anyone familiar with tube testing values? I'm looking at a few sites which list IA and GM values. These are usually presented twice, e.g. one tube has: IA: 67 GM: 4.3 IA: 65 GM: 4.0 Another has: IA: 82 GM: 4.7 IA: 94 GM: 5.8 Both of these are advertised as NOS. I've had a quick google but...

On Saturday I turned on the Q II Forty and Troughline, but absolute silence emerged. Of course I examined the radio and the amp, and tested the radio into a portable speaker. Radio was fine. I noted that the heater in the rectifier valve was not glowing, so I assumed rectifier valve heater...

I have bought a modified Allnic phono stage and I had high expectations but was surprised that it sounded thin. The seller told me he didn't use it much and I thought it needed more burn-in time. But now after months I think something is wrong with the upgrade. Please see the details in the...