Old 06-20-2016, 09:04 AM   #1
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Default Radio Guitar Amp

Radio Guitar Amp Hack

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Old 06-20-2016, 10:27 AM   #2
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But you can't beat the British sound...
https://www.youtube.com/watch?v=HVdG8UF2UMU
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Old 06-20-2016, 11:26 AM   #3
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My first guitar amp was a lead-acid battery powered radio with a pair of KT66s in it!!!

Beautiful leather bound wooden case. I used an old Tannoy public address speaker from an RAF camp for the noise out part!
A mate of my dads helped me convert it to run off the mains.
1954.
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Old 06-20-2016, 11:43 PM   #4
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But you can't beat the British sound...
https://www.youtube.com/watch?v=HVdG8UF2UMU
Yes. Speaker / sound is amazing. Two 9v PP3 batteries - expensive!! Too bad this amp cant be connected via voltage regulator to a 12 volt gel rechargeable battery similar to the UB 1270 (what I remember a busking guitarist friend using). Charged in under an hour: 4 amp charger xtend. Setup lets you play on the street for four plus hours busking in NYC.

Travel light!!

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Old 06-21-2016, 01:12 AM   #5
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But you can't beat the British sound...
https://www.youtube.com/watch?v=HVdG8UF2UMU
Nice natural amp compression on that clean sound
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Old 06-21-2016, 01:19 AM   #6
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~$20 in parts, 9-12V, has an effects loop, plugs into a Marshall stack and will wake everyone in the house, fits in my palm and is my at-home practice rig:

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Old 06-21-2016, 05:43 AM   #7
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Very nice gents.

@karbomusic, did you build this yourself?
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Old 06-21-2016, 05:45 AM   #8
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I did, I have a couple of them at this point.
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Old 06-21-2016, 05:55 AM   #9
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Very nice. I'm looking at something similar here. Anything that I can leverage my 2x12" 8ohm cab.

I may get one of these, or maybe try to build one myself in the future as well, if I have the tools or patience.

Good stuff!
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Old 06-21-2016, 05:57 AM   #10
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Originally Posted by frkasper View Post
Very nice. I'm looking at something similar here. Anything that I can leverage my 2x12" 8ohm cab.

I may get one of these, or maybe try to build one myself in the future as well, if I have the tools or patience.

Good stuff!
Those sure look cool! 5 watts is pretty loud though, the little guy I have above is maybe 1/4-1/2 watt? Just an FYI.
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Old 06-21-2016, 07:44 AM   #11
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Originally Posted by karbomusic View Post
~$20 in parts, 9-12V, has an effects loop, plugs into a Marshall stack and will wake everyone in the house, fits in my palm and is my at-home practice rig:

Nice design / build!!
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Old 06-21-2016, 08:45 AM   #12
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What a cool thread.

What a cool idea!
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Old 06-21-2016, 09:17 AM   #13
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Quote:
Originally Posted by karbomusic View Post
Those sure look cool! 5 watts is pretty loud though, the little guy I have above is maybe 1/4-1/2 watt? Just an FYI.
Awesome. I like the idea of this one as well. 44W out of (24V x 2A) looks too optimistic but I don't care.

Never thought looking after 0.5W micro amps. Good chance to have a look on some. After all, who still have ancient radio these days?

Cheers!
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Old 06-21-2016, 09:24 AM   #14
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Originally Posted by frkasper View Post
Awesome. I like the idea of this one as well. 44W out of (24V x 2A) looks too optimistic but I don't care.

Never thought looking after 0.5W micro amps. Good chance to have a look on some. After all, who still have ancient radio these days?

Cheers!
Mine is literally for practicing at home where all I'm doing is rehearsing for a gig or something. It doesn't sound that bad though considering, I have a little delay I made in the FX loop and just use an OD of mine in front and sits on a permanent fixture of a Marshall 1936 cab. So that is sort of always there ready to go for sheer convenience and late night jamming.

On a side note, wattage is relative and has more to do with dynamic range than 'sounding loud'. For example, My Egnator Rebel 30 is adjustable from 1-30 watts. On more than one occasion I've gigged with it at 2 or 3 watts and get complaints to turn down. All the wattage really changes is how loud it gets when you hit the strings hard, it simply doesn't keep increasing and flattens out the peaks but the other 80% of the volume (not peaks) is still plenty loud. It just gets a little mushier with the lower wattage.

That little radio amp is super cool as well, has a classic sound to it. I love old fuzzy, sounds like the amp is falling apart tones for some stuff.
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Old 07-02-2016, 09:06 PM   #15
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Hi Everyone!!

Channel Master 3 Watt Radio Guitar amp!!!

- MP4 has Abbey Road Plugins

- MP3's have raw vs plugins - so you can hear actual amp sound



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Old 07-03-2016, 09:02 AM   #16
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Hi Everyone!!

Channel Master 3 Watt Radio Guitar amp!!!

- MP4 has Abbey Road Plugins

- MP3's have raw vs plugins - so you can hear actual amp sound


Sweet!
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Old 07-03-2016, 07:10 PM   #17
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Not to Overkill - Pushing the amp / guitar (sound just short of a tube amp sound) - must have germanium chips in radio:

Slow Hendrix Groove

Faster Rock blues Jam

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Old 07-12-2016, 05:51 PM   #18
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Testing: Acoustic guitar (Yamaha FG 420) w/ Seymour Duncan SA1 / soundhole / magnetic pickup ***** - Tascam 106 mixing board (for preamp) into DI box to Channelmaster guitar radio amp. acoustic / guitar amp - experiment changing volume on radio vs mixing board - clean to overdrive.

Don't know why with the Acoustic setup above, when I turn the radio vol up all the way - the radio cuts out. Need to lower the output vol on the radio and adjust output from the mixing board. EMG 85's have their own preamp / active pickups - can just plug the electric tele direct into the guitar radio amp and crank it max. There seems to be a certain range for input where the radio will respond as an amp - clean to overdrive. Go above a certain threshold, and the radio turns silent.

Q: Any way to get rid of the hum? ***** Electric guitar (EMG85's) - very quiet when not played.

Also, what do you think of an external clipon preamp to boost sound so the acoustic pickup can play in guitar amp?

Fishman Platinum Stage Analog Preamp - being discontinued / price drop on Ebay / new

LR Baggs Gigpro Belt Clip Preamp

Last edited by Liquid Fusion; 07-23-2016 at 05:27 PM.
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Old 07-22-2016, 07:11 PM   #19
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Goal: get acoustic guitar w/ Seymour Duncan SA-1 passive / magnetic pickup to power guitar radio amp like the Tele w/EMG85s.

///////////////////////////////////////////////

Figured it out!!!!!! Change Acoustic impedance from high to low - Plug Seymour Duncan SA1 high-impedance / magnetic / passive pickup into a guitar pedal / Boss SD1 - changing output to low impedance. Now Acoustic plays in the Guitar radio amp similar to the Tele w/EMG 85s. Distortion is both Boss SD1 pedal + natural radio guitar amp / vintage germanium chips. Toggle Switch on top of radio: back = guitar amp only / front = radio.

Keeping the Fishman - always good to have a quality acoustic PA preamp. Might see if it can work before the guitar pedal - pushing more of the natural (germanium chip) rock Hendrix distortion. Need more 9 volt batteries. Stay tuned.

Seymour Duncan SA-1 pickup - Magnetic / Passive - adding internal wiring / endpin jack - for street use



Sounds - Acoustic playing Radio Guitar Amp 01 | Acoustic Radio Guitar Amp 02 - rough indie edge -

Reference - All about pickups and impedance


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