I've had real good luck building this Valco 510-11 circuit. For those who would enjoy retrofitting old and good looking vintage cabinets, this design fits the bill. The sound is fat and stuffed to the brim with harmonics. What one could call a "bedroom" amp.

I would be willing to assist in sourcing the 3 common tubes, transformers, and related components. Total cost will be somewhere around $200+ however this circuit is fairly forgiving and used power transformers, sockets, knobs, & chassis not only make the amp look better, it's cheaper as well.

Uses a 5Y3GT, a 6SL7, & a single 6V6. The last one I built went into a suitcase. The preamp section was biased well below maximum, but acted so hot that with the modd'ed preamp volume when turned up added a vibrato. This design is extremely sensitive, simply hammering the neck plays loud. 

In this small venue (Cigar Box Nation) I will be glad to share my schematics & links to the most reputable parts suppliers. This amp will not only fit a small foot print, but will preform well with a standard guitar & will allow you, the tube novice (and experienced builder alike) to enjoy the amp that Jimmy Page used to record Stairway To Heaven with. 

Search the web for Valco 510-11 images. The drawing is tilted slightly, that's the one.

If there is some interest, I'll post a couple of pics of what I have, maybe a youtube clip as well.

Rest regards, Doug

Views: 2876

Attachments:

Replies to This Discussion

Man, this looks super cool! Could be a real fun project sometime soon. I love small amps and this one seems like a very nice little design. I for one would love more photos and some sounds...

If you made a youtube clip I would put it on my site!.....I know a lot of folks would like to try

Hey guys, 

Here is a clip for a customer of his Valco based 510 modded with a master volume & a 3 position mode switch.

https://www.youtube.com/watch?v=Egf5cuGwu_c&list=UU9W4Vl201YkwF... 

 

Some technical notes: 

Master Volume is a sub'ed out 270K resistor going to pin 5 to ground on the 6V6 final amp tube. Replaced w/ a 1Meg pot. This gives the vibrato-tremolo effect above 75% on either the master or pre volume control. Actually adjustment of the master (when the pre is at 75%) sometimes will increase the speed. Played through a 12" 8 ohm speaker. The bigger the speaker, the better. As you can see, I can't play worth a $@*!. But hammering was around 75% of the hard hit volume. It was loud with a bunch of bass. That's one thing you get with these 40's style amps and the larger 8 pin tubes, fat sound.

Some other additions to the included schematic are:

Pin 3 of the 6SL7 shows a 2.2K resistor paralleled with a 25uf electrolytic 25volt capacitor. This is where you can have some fun finding your own sound. What worked for me is connecting the wiper of a 3 position rotary switch to ground, and then the other 3 positions to pin 3 via the 25uf/25v pair on posit 1, and typically a 330k/22uf @ posit 2, and a 100k/47uf @ posit 3. Try your own combo to see what sounds good to you.   

You might want to invest in a resistor decade box and "dial" in the resistor w/ your current choice of Cap jumpered across the decade box. 

The power transformer (called "PT" or generically "XMF") I normally is anything that will deliver at least 100Ma at about 700 volts AC+. I will list a link to a $70 XMF that will fit the bill. One of my questionable habits is hoarding old scrapped out test equipment, HiFi chassis available from some hard to find resources, but their on ebay. Be it an old Hammond amp chassis, Admiral, Zenith, whatever. Spec'ing the PT for this design includes the following wires: input voltage; should be 112Vac to 125Vac. The output wires will include 2 red wires- red for a reason. These are the High Voltage wires. normally with a halfway center tap colored with a yellow stripe...which will be connected to ground. Also a set of green wires, perhaps also with a yellow striped 3rd green wire which will also go to ground. This is your 6.3Vac filament wires for the 6SL7 & the 6V6 tube. The 5Y3 rectifier tube takes the yellow wires (pair) which is at 5Vac. Here is a link to an affordable power transformer from a very reputable vendor...http://www.classictone.net/40-18085.html 

or this one...http://www.classictone.net/40-18062.html 

Click on the "specification" link and review the wires and purpose.

On ebay I have noticed these for cheap....http://www.ebay.com/itm/EICO-Signal-Tracer-Model-147A-/121427563398...      what you get is a chassis, Power transformer, sockets, rectifier tube, and an eye tube! (I still need to spend a day working on the eye tube bit). 

Qs anyone?

More soon, some vintage "tombstone" pics and links later tonight. - Doug

here are some pertant pics to this build..

this is typical of the re-use of old tombstone cabs..

Attachments:

Above: thats a 1946 era correct Fender 10" speaker, what a find! The small XMF in the front of the pic is the Output Transformer. Cheap, $4

Stuff that I recommend for any serious amp builder.....resistor decade box, about $10 ebay

The ever important 5 amp Variac.....ebay hopefully no more than $50. Having a set of "mini clips" for use for connecting to wires/leads make easy and safe work on these amp projects. And also most important, a collection of 1 watt resistors....ebay link    http://www.ebay.com/itm/500pcs-1W-Metal-Film-Resistor-Assortment-ki... 

RSS

The Essential Pages

New to Cigar Box Nation? How to Play Cigar Box GuitarsFree Plans & How to Build Cigar Box GuitarsCigar Box Guitar Building BasicsCigar Box Guitar Parts Store

Site Sponsor

Recommended Links & Resources

Discussion Forum

Sweet Norwegian Transistor Radio - any tips?

Started by Elliott Fisher. Last reply by GARY KNIGHT Mar 25, 2018. 4 Replies

Battery valve radios

Started by Bird. Last reply by Bird Nov 22, 2016. 6 Replies

3 tube 8 watter Valco style amp with swamp sound

Started by Doug Christensen. Last reply by Doug Christensen Oct 17, 2016. 66 Replies

hey guys just alittle info please

Started by gregory lazorchak. Last reply by Denis U Jul 23, 2016. 3 Replies

Hitachi Transistor Radio with Tape.

Started by David Wilson. Last reply by GARY KNIGHT Jul 4, 2016. 9 Replies

Mini Amp - Where Do I make Connections? What is missing?

Started by Brian Revels. Last reply by daniel clarke May 13, 2016. 1 Reply

Car radio Amp

Started by Orcabait. Last reply by GARY KNIGHT May 10, 2016. 1 Reply

Question

Started by BILL GRONER. Last reply by Wayne Bigler Apr 9, 2016. 2 Replies

1962 Silvertone Medalist 3217

Started by Monterey. Last reply by Scott aka Farmer Ted Apr 3, 2015. 11 Replies

New jack in an old radio

Started by White Raven. Last reply by Scott aka Farmer Ted Mar 30, 2015. 3 Replies

Suitcase Amp

Started by Gary Ross. Last reply by Gary Ross Jan 26, 2015. 4 Replies

Arvin 8 Transistor AM radio...

Started by Corbin. Last reply by Corbin Jan 16, 2015. 11 Replies

Low volume with your Hacked Radio --- Amp

Started by Corbin. Last reply by Corbin Jan 12, 2015. 4 Replies

DIY amp question

Started by Greg Thompson. Last reply by Greg Thompson Jan 10, 2015. 2 Replies

1964 Philips AM/FM Radio to guitar amp project

Started by Scott aka Farmer Ted. Last reply by Scott aka Farmer Ted Jan 8, 2015. 4 Replies

Thank you beetle juice!

Started by Greg Thompson. Last reply by Jim Quinlan Nov 6, 2014. 5 Replies

Preamps

Started by John Newman. Last reply by 3 String Guitars Aug 21, 2014. 3 Replies

Grundig Yacht Boy Radio

Started by Keith 66. Last reply by 3 String Guitars Aug 2, 2014. 1 Reply

Having problems with a 1959 Silvertone 9014

Started by Darren Addy. Last reply by 3 String Guitars Jul 30, 2014. 1 Reply

Latest Activity

Daniel Walter replied to Paul Craig's discussion What's on your workbench?
"Right Taff. The mating surfaces have to be perfect, hard to do by hand. If you really want to blow…"
14 minutes ago
Dave Lynas commented on Dave Lynas's video
Thumbnail

Isabela Polka

"Thanks Uncle John. She’s a very large woman. A large shoe size and even bigger feet. But once…"
15 minutes ago
Dave Lynas commented on Dave Lynas's video
Thumbnail

Isabela Polka

"Thanks AGP. THE TINY SUCKER came from my bank. Good though."
19 minutes ago
Dave Lynas commented on Dave Lynas's video
Thumbnail

Isabela Polka

"Thanks Daniel. I try not to step on her feet. "
20 minutes ago
Jim Codog added a discussion to the group Building a Cigar Box Guitar 101
Thumbnail

Fretted....

Hey folks,So I am about to start work on my 1st CBG! Ordering parts now and will start in early Dec…See More
21 minutes ago
3 String Guitars posted a photo

- Early 1900's Homemade Soap Box Bass -

--------------Check out this cool homemade bass box instrument!If you enjoy learning about the…
22 minutes ago
Dave Lynas commented on Dave Lynas's video
Thumbnail

Isabela Polka

"Thanks Chris. Nice to have you back. "
22 minutes ago
3 String Guitars commented on 3 String Guitars's video
23 minutes ago
Chris Thomas commented on Dave Lynas's video
Thumbnail

Isabela Polka

"Nice one Dave, the old masters are the best mate, keep on keeping on still doing it in fine style,…"
28 minutes ago
3 String Guitars posted a video

- Old Timer Cigars - Western Slide Blues - Cigar Box Guitar Pickups for sale

these pickups are on sale visit the website https://www.3-string-guitar.com or visit Red Dog Guitars .com
29 minutes ago
Glenn Kaiser posted a photo

PaintStickGit

Sorry about the angle... You can read all about it a glennkaiser.com
43 minutes ago
Jim Codog joined Shane Speal shanespeal.com's group
Thumbnail

Building a Cigar Box Guitar 101

This group is for discussing the basics of CBG building for newer builders - where to start, what…See More
47 minutes ago

Music

Loading…

© 2019   Created by Ben "C. B. Gitty" Baker.   Powered by

Badges  |  Report an Issue  |  Terms of Service

\uastyle>\ud/** Scrollup **/\ud.scrollup {\ud background: url("https://storage.ning.com/topology/rest/1.0/file/get/963882636?profile=original") no-repeat scroll 0 0 transparent;\ud bottom: 25px;\ud display: inline !important;\ud height: 40px;\ud opacity: 0.3 !important;\ud position: fixed;\ud right: 30px;\ud text-indent: -9999px;\ud width: 40px;\ud z-index: 999;\ud}\ud.scrollup:hover {\ud opacity:0.99!important;\ud}\ud \uascript type="text/javascript">\ud x$(document).ready(function(){\ud x$(window).scroll(function(){\ud if (x$(this).scrollTop() > 100) {\ud x$('.scrollup').fadeIn();\ud } else {\ud x$('.scrollup').fadeOut();\ud }\ud });\ud x$('.scrollup').click(function(){\ud x$("html, body").animate({ scrollTop: 0 }, 600);\ud return false;\ud });\ud });\ud \ua!-- End Scroll Up -->