A question I hear a lot. Do I need to have my Valve amplifier biased? So What is Bias. Well to put it simply the bias of a Valve amp is set by adjusting the grid voltages to set the idle current of the output...
So you are thinking of buying a valve (or tube) tester and perhaps wondering where to start.The type of tester you want to avoid are utility testers that just check filament continuity – you can do that with a...
Quad 33/303 Amplifier General These amplifiers were made from 1967 and had a production run of about 15 years. They were one of the best amplifiers around at that time for both design and technical...
If you are thinking about purchasing a vintage Akai tape recorder I though a few tips on things to look out for /common faults might be useful. Akai recorders were the very top end of the domestic market in...
Voc Rock Guitars Audio Reviews on ECC83 12AX7 Pre amp tubes. Essentially there are only 3 major tube manufacturers remaining in the world today. We decided to put the 3 most popular tubes manufactured by these...
Hopefully this short article will help some eBayers whom are unsure about what type of tape to use on their recorders . If you have a tape recorder that has' pressure pads' which press onto the record.and or...
Military valves have different markings to commercial valves. Most have a CV number (CV = common valve) It is best explained with an example. I recently sold some E88CC or 6922 with the following markings...
I don't usually get on my high horse, but I keep on seeing various eBay items that explain how to service your own valve amplifier, etc. Note: For anyone who pooh-whos this and chooses to ignore what I am...
Running Your Open Reel Recorder,and magnetic tape. Ok So you've bought a Reel to Reel Tape recorder - GREAT! ..... If you don't know too much about these..... I'll try and give you some advice on running...
There are a lot of vintage radios, etc appearing on Ebay these days, and I feel it would be prudent to warn sellers with no idea about the unit that they could be in for a nasty surprise. Many times in...