Old school Bogen Tube PA (viable Guitar amp?)
- tubetapexfmr
- steve albini likes it
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- Scodiddly
- speech impediment
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It's actually more difficult than it looks - that animated .gif is sped up a bit. With max 78 RPM you're looking at a tremelo speed barely above 1Hz. I did see one guy's approach of aiming the speaker down into a coffee can with multiple holes to get a faster tremolo, and my own idea is to make a sort of layer cake of baffles to get a setup where there are three 120-degree openings to effectively sextuple the 78RPM.jessemesasavage wrote:Oh, man what a cool idea for converting a turntable! Now I have to go out and find me one of those guys to make a fake leslie with.
that's awesome! I know those old califone tube amp/record players well..Scodiddly wrote:I had an old Bogen mixer/amp tube thing I bought years ago, and eventually transformed into a frankenstein Fender/Marshall 50 watt amp. I don't play loud guitar often, so I loaned it to a friend who still hasn't given it back. That was around 10 years ago.
One of these days I need to get back to that Bogen tube turntable/amp thing I acquired from my antique dealer cousin a few years back. That thing sounded great for leads, but I spent more time on the similar product from Califone because the turntable still works.
Lately I've been thinking about building a real rotor (Leslie style) for that turntable.
I still use my solidstate rheem califone tape machine for lofi and crackly leads.
sounds like super compressed/built in speaker and a hacked sound.. it's the champ.
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- gettin' sounds
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i think it is, same tube layout as my Bogen.jessemesasavage wrote:Is it the model M204? I have one of those and I can tell you whatever you want to know about it. First of all it is almost identical in design to the Bogen CHB-35A.my main practice amp is a 20 watt McGohan head thru a 4 x 10 cab
I dont want to touch the Mcgohan, bought it from a guy who mods these PA amps on ebay. So its already tweaked perfectly, tone is absolutely incredible. My fave amp by far.
The Bogen on the other hand is def a beater - and on my list to mod
- tubetapexfmr
- steve albini likes it
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I search for McGohans on ebay all the time but I have never seen any modified ones. DO you have a name or other info for this guy? I am curious what he does and how much he charges. Since you've got your McGohan I'd say apply my advice on making a badass amp and just apply it to the Bogen CHB-35A. I am just waiting on some tone pots to finish mine and then I'll be able to show you guys what it is capable of.I dont want to touch the Mcgohan, bought it from a guy who mods these PA amps on ebay. So its already tweaked perfectly, tone is absolutely incredible. My fave amp by far.
Jesse
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- gettin' sounds
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the fellow i bought it from sells under the name 211 amps
he doesnt list alot of stuff. He's very meticiulous. This amp was from a stereo pair. IMMACULATE. Cleanest point to point wiring, all bent wires, just gorgeous. He recaps, voices the channels (blendable too) and i think messes with the EQ to make it more guitar friendly. I think i paid $120 for the amp. The matching one closed around $200 something.
I'm VERY interested in what you're doing to the challenger.
he doesnt list alot of stuff. He's very meticiulous. This amp was from a stereo pair. IMMACULATE. Cleanest point to point wiring, all bent wires, just gorgeous. He recaps, voices the channels (blendable too) and i think messes with the EQ to make it more guitar friendly. I think i paid $120 for the amp. The matching one closed around $200 something.
I'm VERY interested in what you're doing to the challenger.
- tubetapexfmr
- steve albini likes it
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Aha, I have seen that guy before. He sounds pretty good. Did it come with the input transformers for that price? If so that is a steal. The transformers alone are worth that much each! Did you know those green octal plug-in transformers are made by Peerless? It is the same inside as the Altec 4722. I think it is model MC-1 and has 50 ohm and 200 ohm input taps. There is also a blue MC-2 that I think is a Peerless as well, but I am not sure. The blue one only has the 200 ohm tap but may actually be the same transformer inside. I don't feel like tearing mine apart to find out. They sound the same to me so that is all the proof I need. Anyhow if you have either of these transformers they make great mic inputs for tube pres or step-up transformers for Moving Coil Vinyl pickups.the fellow i bought it from sells under the name 211 amps
Yeah, I am finding a lot of interest with these Bogens, especially the common CHB-35As. They seem to be everywhere! You will love the posting I put up about it once I am done with it. I am waiting on parts until the middle of next week, but by then I should have something to show!I'm VERY interested in what you're doing to the challenger.
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