Archived Posts from this Category

Ultimate Tone Volume 1

Posted by on 17 Nov 2015 | Tagged as: Amp/Tubes

Want to know about tube amps and how to modify them? I have this book and it is excellent! There is tons of information on tube amp circuitry, this is a must-have if you want to learn about tube amps.

One tube of amp showing basically zero current

Posted by on 11 Aug 2015 | Tagged as: Amp/Tubes

My Fender Bassman was showing zero current at idle on one of the two 6L6GC tubes. I knew it was isolated to the socket because swapping the tubes showed the same zero current on the same socket. To make a long story short, the screen resistor (470 ohm) was fried. This is a 1 watt 470 ohm resistor that goes across pins 4 and 6 on the output tubes. The real culprit was a bad tube that would draw too much current.
Replaced the screen resistor and tube and all is good.

The symptoms of the bad tube/burnt screen resistor was low output volume and extremely low/none current across the 1 ohm cathode resistor.

Tubes for dummies article

Posted by on 28 Jul 2015 | Tagged as: Amp/Tubes

Here’s an old article I wrote for beginners to understand tubes a little more – coming from a stompbox perspective:
Tubes for dummies

Vintage Fender amp schematics and layouts

Posted by on 28 Jul 2015 | Tagged as: Amp/Tubes

Looking to repair your old Fender amp?
This site has a ton of schematics and layouts and they are cleaned up.
Nice site!

Vintage Fender Amp Repair

Cool DIY “beam blockers”

Posted by on 13 Aug 2009 | Tagged as: Amp/Tubes

Very interesting use of foam to help prevent “beaming” of speakers.

Check it out.

Good thread about cathode bypass caps

Posted by on 28 Jul 2009 | Tagged as: Amp/Tubes

as used in Tube Amps. Check it out.

Here’s a great thread about PS caps

Posted by on 28 Jul 2009 | Tagged as: Amp/Tubes

A great Music Electronics Forum thread on power supply capacitors for your amp. I used the balancing resistors on my 64′ Fender amp and it has worked great!

If you have an old Fender amp, most ceramic sockets don’t fit

Posted by on 07 Jul 2009 | Tagged as: Amp/Tubes

I have made this mistake several times. I purchase ceramic tube sockets for my amp – you know – “Fender” size. However the older tube amps have the hole cut smaller. They don’t fit.

Three essential tube amp tools

Posted by on 07 Jul 2009 | Tagged as: Amp/Tubes

As I debug a popping sound in my amp – I reach for a chopstick. Very useful for more than eating!

TubeNexus article on useful tools for your amp.

Eminence Speakers… very good

Posted by on 14 Oct 2008 | Tagged as: Amp/Tubes

I was amazed at the tone my friend got with his very good Carr Amp. I loved the detailed midrange of the amp. Unfortunately I couldn’t connect my Bassman to his speaker easily, so I took a chance and purchased an Eminence speaker that someone from the forum was selling. On paper, the speaker response of the different models look very close. The main differences being the bass and midrange response.

The Legend speaker I got did remind me of the tone of the Wizard – much better midrange than what I am used to getting with my Celestion Greenbacks. It brought out the nice midrange of my guitar, without any of the harsher tones. Based on this, I wouldn’t hesitate to try a Wizard speaker, even though it’s a brighter speaker. So far I am sold on Eminence speakers…. Very good!

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