Turn a Record Player into a Tube / Valve Amplifier. DIY Champ / Princeton Guitar Amplifier.

[@skullheadwater9839]

You guys are lucky, by the early to mid fifties and the United States virtually all portable record players used either one power tube while using the motor to drop the rest of the 120v or else if it did have a rectifier, power tube and preamp tube it was a transformerless design using series string filaments like a 35Z5 rectifier, 50L6 power tube and maybe a 12SL7 for the preamp. I suppose that was due to the higher line voltage. Most of the radios by the 50s add Siri string filaments and transformerless designs

[@bigbasil1908]

It seems the speaker works well for guitar. I briefly tested the speaker on mine out from a jack lead from my laptops headphones output to the speaker and obviously being the headphones output, it was'nt very loud but at least confirmed that the 70 year old speaker was working.

[@bdg77]

Sounds great!

[@bigbasil1908]

I bought one of these off of fleabay a couple of weeks back. My one is a slightly earlier version that does not have the red power light, but apart from that looks the same. There is hardly any noise coming out of the speaker, so I need to change the 4 paper capacitors for probably film capacitors and if the audio is still not working then it is probably a faulty output transformer. I plan on turning it into a guitar amp. The capacitors I need to change - from the booklet photos = C1 Paper 0.15uf 125v C2 Paper 12,000pf 125v C3 Paper 12,000pf 400v C5 Paper 4,700pf 1,000v

[@OldStationRecords]

Great, thank you. Beautiful video, I added your channel, and will follow it. Nice sound and performance, also your playing is very cool. Best regards from KY, joe

[@madjacktv2226]

Thank you. Very much appreciated.

[@raceingdemon6464]

Lovely Stuff Jack And Well Played As Well Great Job On That Very Nice Amp I Made a Small Guitar Amp Back In The Day But I Used a Sinclair ic12 Chip And a Discrete Pre Amp With Transistors For The Tone Controls With 2 Inputs For Guitar and Mic Not As Nice As Your Amp But Not Bad Thanks For Uploading Regards mike.

[@madjacktv2226]

Thanks for watching Mike- and thanks so much for your kind comment!