Quick Intro to the Fender Bassbreaker 007 The Fender Bassbreaker 007 is a cute little valve amp. There are two versions – a head and a combo. It has two 12AX7 pre-amp valves and one EL84 output valve. It has a 10 inch Celestion speaker. A nice compact practice amp. Check it out on the Fender website. Fender quotes this amp as 7 watts audio output in the manual. It does not say whether […]
A brand New feature for amp techs and amp makers We have a brand new ” Website Trade Area” for amp techs, service folks and amp manufacturers. You can find the new “Trade” tab on the top left of our homepage Our new website trade area gives discount to regular purchasing customers who are in amp related businesses. If you repair, service or build amps then this option is just for you. Also good for
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De-Mystifying Sovtek 12AX7 WA WB WC Variants I thought it worth the time De-Mystifying Sovtek 12AX7 WA WB WC Variants. Why are there three versions of the Sovtek 12AX7 and what use one versus the other? One common characteristic of all three types is that they are very low in microphonics. The “W” in the part number is there to tell us its a ruggedised valve. Ruggedised valves are made to withstand more vibration than a
A Marshall JCM900 100 Watt Combo arrived in the workshop. This version is the 4102 It was very poorly. The first issues seen were : 10 amp fuse in the plug!! Low power output and VERY loud mains hum Pots noisy Amp plays a dying gasp when amp switched off Pops / crackles and very low volume. The valves were tested on an AVO MkII and CT160 tester. The preamp valves were down to a lot
The early (1997-2003) Marshall JCM2000 DSL50, DSL100, TSL100 and TSL122 amps are often troubled by an unstable bias (drifting bias). These are nice amps and I have one myself This can be difficult to diagnose correctly, as it can take half an hour or more of testing and/or playing before this Marshall JCM200 bias drift shows up. . Due to this drift the bias current of the output valves will gradually increase, and keep increasing,
fix-Marshall JCM2000 Bias Drift UPDATED Feb 2024 Read More »
Here are Things learned about Valve Amps in 2018 . They are in no particular order. Perhaps some useful info about your amp. I thought I would share them before they faded out of my head Loudness of your amp Your ears respond to sound like a compressor. So when you ears hear the sound from a 10 watt amp and a 100 watt amp, you don’t hear an amp that is ten times louder.
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