Many amps have a valve rectifier valve. Typical types are EZ81, 5Y3, GZ34/5AR4 and 5U4. There are variations on the letters at the end of the part number but the basic part number product will do the job. The alternative is to use solid state diodes. So why have a less reliable valve/tube rectifier than modern diodes? rectifier is just the old name for a diode. How do you know when your rectifier valve needs […]
Find the valves you need quick and easy We have added new categories to make it easier finding valves/ tubes . If you go to the ” Categories “ menu at the top of the page you find instant links to common types. The idea being to find stuff faster. If you are looking for more unusual pre-amps such as the 12DW7 or ECC99 they are still there just look in the “preamp valves” section
A Peavey Classic 30 Restoration was undertaken. Initially it was taken in for just a repair. It had sat in a garage for many years. There was rust on the face plate so a good indication dampness had got to the amp too. The amp had been switched on by the owner and it was totally dead. Having gone through the amp I can now provide details of the autopsy. The electrolytic capacitors in the
A Marshall JCM900 Breaking Valves was the cause of this amp’s failure. It travels around a lot and it has the original 1990’s valve retainers on the output valves. The original ones fitted to this 4102 model are shown below. These are fitted over the 5881’s to hold them in place. The issue is that an amp is well gigged and in and out of vans suffers a lot of vibration. These holders rub on
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. Click on the Logo/Register button on the top left of our homepage. Then complete the simple form. We might ask some questions. When the account is apporved, you will receive an email asking you to change the password. A username will be allocated. Make sure you have
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