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PL504 circuits. | diyAudio
https://www.diyaudio.com/community/threads/pl504-circuits.30533/
Klein und Hummel had many amps with this tubes , first they use EL 36 , then came EL 500 ( PL 500 ) , EL 504 in the same circuit . The EL 36 version is the K +H VS 70 , the VS 71 is the newer one with EL 504 . Also their studio mono amps V 30 were build with EL 504 , in all these amps the driver tube was ECF 80 with the triode as phase inverter .
4X PL500 / PL504 PP Mono Tube Audio Amplifier With ...
https://www.youtube.com/watch?v=OxFGdXkcFgk
This is a 4XPL504 Audi amplifier with mono built in mixer and Bluetooth Function. The output power is about 25-30W into 4 ohms load. Max 60W music power out....
PL504 low power amp - The RadioBoard Forums
http://theradioboard.com/rb/viewtopic.php?t=5545
Plain design, meant to be an amp for PC, phone or tablet. No volume pots, that is for the iPhone or whatever to manage. The transformers are 220V --> 18V , just right ro adapt the PL504's to a 4-8 Ohm output.
Hi quality Push Pull Amplifier with PL500 / PL504/ EL500 ...
https://www.tubes.rs/quality-push-pull-amplifier-pl500-pl504-27gw6-12au7-ecc82-12ax7-ecc83/
This is hi quality bass guitar amplifier with output TV sweep tubes PL500 PL504 27GB5 EL500 EL504 6GW6 6P36S 6P41S 6GB5 push pull class AB2. Frequency range: 30Hz-15kHz @ Po=30W continious, 0.5dB. Distortion: 40Hz 1.4%, 1kHZ 0.8%, 10kHz 1.7% for full continious power 30W: These sweep TV tubes (line deflection valves) are still available in big quantaties and it’s easy …
PL504 amplifier • SVETELEKTRO
https://svetelektro.com/Forum/viewtopic.php?t=24236
PL504 amplifier. Zdravím, chcel by som sa opýtať na túto schému elektrónkového zosilnovača s PL504 že aký to dá výkon, aký tam mám dať výstupný transformátor a ak poznáte lepšiu schému tak mi ju prosím poraďte za pomoc ďakujem. Na prezeranie priložených súborov nemáte dostatočné oprávnenia.
27GB5 / PL500 / PL504 Audio Tubes - www.thetubestore.com
https://www.thetubestore.com/27gb5-pl500-pl504
Order 27GB5 / PL500 / PL504 vacuum tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier.
Homebrew Radio Links - K3UH (Russ)
http://k3uh.com/test/Audio_Amplifier_-_2_Stage.htm
Stereo amplifier, four times PL504 [from German] Nice tall, thin power tubes with improvised (?) caps for a cool new look. Class A Amplifier: 12.0: PL504(2) 7: Beam power tube EL504 [from German] Similar to his PL504 Verstarker, but allows switching from triode to pentode modes. Also different packaging. Class A Amplifier: 14.0: EL504(2) 8
PL500 regen - The RadioBoard Forums
http://theradioboard.com/rb/viewtopic.php?t=7822
Conclusion: If you have watts to burn, a PL500/PL504 is an excellent regenerative audion tube, verrry sensitive. Aa a bonus: Local (e.g. dutch ) builders - for 10 euro's you can collect two used PL500 and an HP transformer plus two of the 18 Ohms rheostat resistors at my home in Naarden- a few available.
OTL Asylum - Audio Reviews, Audiophile Forums and Stereo ...
https://www.audioasylum.com/cgi/vt.mpl?f=otl&m=34797
My amp, which I have had for last ten years, has at the moment a number of different brans of tubes. These included National Electrics CVC Chember and many unbranded. Can biasing the amp overcome any difference with the tubes.I have found a set of 32 PL504 from Valvo made by Mullard. Have you had any expierance with these tubes.
Vacuum Tube - 27GB5 / PL500, Beam Power Amplifier ...
https://www.tubesandmore.com/products/vacuum-tube-27gb5-pl500-beam-power-amplifier
Add to cart. Vacuum Tube - 50C5, Beam Power Amplifier. Miniature beam pentode primarily designed for use in the audio-frequency power-output stage of radio receivers. The tube features high power sensitivity and high efficiency at relatively low plate and screen voltages. $24.90.
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