Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Misc Schematics and Layouts => Topic started by: cincyjack on December 05, 2020, 01:11:54 pm
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Greetings tubeheads.
I’m a novice with an inherited little mystery amp that I thought might be fun to spruce up, if necessary. Easier to start with a kit but I’m hoping there are some basic things to be learned from this freebie.
I understand all the caveats and risks of working with tube amp electricity.
The amp in question worked the last time I fired it up years ago. I was told it’s a silvertone. The chassis is unmarked in a homemade case.
Closest I could fund was a silvertone 1449. Whereas the 1449 calls for a 6V6GT, the amp at hand has a 6BQ5. The other tubes are similar: 12AX7 x 2, 6X4.
http://schematicheaven.net/bargainbin/silvertone_1449.pdf (http://schematicheaven.net/bargainbin/silvertone_1449.pdf)
Transformer nums are:
TF 509-0
-606-541
TF102-P
606-542
I’d like to identify the amp and find the schematic.
At a minimum, I want to replace the two prong power cord, which I will address in a seperate post if I need help. Ideally I could test the components and replace those out of spec but realize that may be wishful thinking. If it powers up, prob a good idea to check the bias.
Any ideas for identifying this unit would be appreciated.
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Much bigger pics would help identify this amp but I suspect it's this Gibson... Even the chassis layout looks the same.
https://el34world.com/charts/Schematics/files/Gibson/Gibson_skylarkga5t.pdf
I suggest to just plug it in and see what happens before replacing anything. No need to check bias on this simple cathode biased amp.
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Cool!
Thanks sluckey. I’ll have to research that amp.
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Just for the record, this amp turns out to be from a Kalamazoo Model 2.
Nicer schematic!
https://irationaudio.files.wordpress.com/2016/10/kalamazoo-model-2-schematic1.jpg