Vintage 1966 Alamo Fury Model 2566 Bass or Guitar 25 Watt Tube Amp

Here’s a great sounding amp with a different look.  The amp is an Alamo Fury Model No. 2566 all tube bass and guitar amp.  It was made in San Antonio, Texas.  Some Alamo Fury amps have a solid state rectifier and/or a solid state preamp.  This is an all tube amp.  This of course is a used amp.  The amp was not working when I acquired the amp.  It was missing all the tubes and the 15” speaker.  Fortunately, there were not any serious issues.  The amp is worn a little and there are numerous holes in the tolex but nothing too serious.  This amp is not a museum piece as far as original condition.  But the graphic on the grill cloth is generously cool.  The graphic does not affect the 20 Watt output of the amp.  The cabinet is made of real wood and is very structurally sound.  There is some rust on the chrome hardware on the faceplate, at the handle ends and on the amp corners but not too bad.  The handle is a very strong handle with a vinyl covering over a steel sheet and is in good shape to tote around this very heavy amp.

Here’s the tube lineup. There is a 5U4 rectifier, two push-pull 7868 x 2 matched power tubes and two preamp tubes, a 7199 and a 12AX7A.  All tubes were tested on an Amplitrex tube tester and the tubes test strong and sound great. The amp is cathode biased so there will be no need to re-bias the amp should you choose to ever replace the power tubes.

Notes about the amp:

The original transformer which came with amp includes the power transformer, choke and ultra-linear output transformer.

The three CTS volume and tone pots are dated late 1965 and early 1966. $$$

The circuit uses cloth wire mostly and is all flying leads.

The “Death” cap was removed.

The filter caps were replaced with 500V Tech Caps capacitors, made in the USA and they are great filter caps.

Used Russian K40Y paper-in-oil capacitors on the power tube coupling caps and they sound great.

All other coupling caps were replaced with 630V Mallory caps except for a few original ceramic caps.

All out of tolerance resistors were replaced with 1 Watt resistors.

A 15”, 8 Ohm CTS speaker was installed that came from a large, organ tone cabinet. This speaker sounds great and appears to be a speaker made in 1970.

The original Alamo badge is missing.

The original paper tube chart says the amp is licensed by Western Electric and AT&T.

A heavy-duty, three-wire, 8’ grounded power cord was used to power the amp.

A lot of extra work was put into the amp to reduce the hum that was from a poor grounding scheme. I put in a preamp star ground, isolated the input jacks and pots from the chassis and moved their grounds to the preamp star ground. I also moved a few other power grounds closer to the transformer. This helped tremendously.

All this information maybe too much but it means something. This is a great sounding amp. It is very clean at low to middle volume and gets nice, creamy distortion and full volume. It is a loud amp for 20 Watts. This amp will also be a reliable amp for a long time with the components that were selected for this rebuild. No shortcuts were taken. Great tubes and electronics were used. I see this amp as great sounding piece of art rather than a pristine, original collector amp. I am an engineer who has worked on and sold a lot of amps on eBay for almost twenty years and have not has one amp returned. I don’t find them and take a few pictures and list them on eBay. I work them over to provide a great sounding, reliable amp. This amp is ready to rock for many years.