A Vox Ac30 CC2X arrived that was sounding mushy, crackling and popping and when you tapped the case made wonderful microphone ! On removing the back it was obvious that the EL84’s had been in the amp since new and I guess the amp to 5 or more years old. One of the ECC83’s had been changed for Groove Tubes at some point. On testing the EL84’s they were totally mis-matched to each other and […]
Note: We now have a new, superior solution to Marshall JCM2000 bias drift issues. Find the details here. I have now worked on two Marshall JCM2000 amps and both are around 10 years old. Both had very similar faults. The fault on both was that the amps sounded “rubbish” and both were cooking the EL34 output valves. Instead of running at about 45 mA of bias current the lowest adjustment you could achieve was over
A really neat added value benefit of using Tung Sol valves in your amp is their low microphonics. During testing at the factory Tung Sol Valves are tested on a vibrating table to ensure they are not microphonic. Of course this extra testing adds a little bit to the cost. I first witnessed this benefit in my own original silverface Fender amp. Ever since it was new way back in 1970 the amp was always
We have added more new products! We have launched our first group of guitar pedals and effects. They are from Electro Harmonix in New York City. We are an official authorised distributor of Electro Harmonix and to date we have been successfully selling their range of valves/tubes . These are branded Electro Harmonix, Tung Sol, Sovtek. Electro Harmonix have a huge range of pedals and effects. We are introducing the range in phases as it
New Product Line Electro Harmonix Pedals and Effects Read More »
Here is a customer’s feedback on replacing the EL84’s with Sovtek EL84’s. I have only removed the customer name I promised you an update on the Sovtek EL84 valves and how they handled in my Bugera V22. Well I have been using them for about three months now and I am absolutely delighted with the changes they brought to the Bugera Infinium V22’s tone and even ‘feel’. To be frank I have never considered
Matched Balanced Pre-Amp Valves How Are Pre-Amp Valves Matched/Balanced? You might not be aware but no valve manufacturer will test for matched balanced pre-amp valves. So quality valve sellers invest in good quality test and characterisation equipment so that matched balanced pre-amp valves can be identified. This means we have to individually test every pre-amp valve we have in our stock so that we can find the matched ones. This is a slow process as