While I was sitting drinking my morning coffee, I found this interesting article on diagnosing valve tube problems in amps ( I know I am a bit sad!). It is on the Mesa Boogie website and I thought it was worth sharing. it is well written and I thought it would be useful for folks when their amp starts “misbehaving”. We have suffered not just tha p stopping in its tracks, but the crackles and
Valves Tubes Be Careful What you buy ! There are many vendors of valves and tubes and I thought it might be useful to make a list of my observations in the market. Of course I cannot be totally un-biased as I sell valves/tubes on this site and we sell limited selection of what we offer on Ebay too. Now I am not criticising at any sellers but some clearly are less technically capable than
I was on the hunt for a nice original Vox AC30 from the 1960′ s and it got me thinking on why I wanted it and what work it would need. Now I have worked on AC30’s in the past and my first AC30 was GIVEN to me as it was considered beyond repair. The player had sat a pint of beer on top of the amp, by all accounts the pint glass was almost
Note: If you’re experiencing bias drift issues with a DSL50 (or any other JCM2000 amp), find have the solution here. This weekend, I worked on a lovely 6 year old, Marshall DSL50 amp head. This was the unit I mentioned in a previous post that was awaiting my attention. It was working however the output valves were mighty hot. I checked the bias on those two beautiful EL34’s and found I could not adjust the
