Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: phsyconoodler on December 16, 2013, 12:00:41 pm

Title: deluxe reverb with el84s
Post by: phsyconoodler on December 16, 2013, 12:00:41 pm

Just built a deluxe reverb with el84s for a guy and what can I say but...wow! Killer grindy deluxe/marshall tones. It overdrives so beautifully with either humbuckers or single coils. Im embarrassed to say it drives nicer than my 18 watt builds. Go figurr!

Title: Re: deluxe reverb with el84s
Post by: punkykatt on December 16, 2013, 02:00:45 pm

Phsyco, did you do any mods to the PI or leave it stock?

Title: Re: deluxe reverb with el84s
Post by: Raybob on December 16, 2013, 02:16:34 pm

Curious to know plate/screen voltages you ended up with on the EL84s.

Title: Re: deluxe reverb with el84s
Post by: plexi50 on December 16, 2013, 02:50:38 pm

Quote from: Raybob on December 16, 2013, 02:16:34 pm

Curious to know plate/screen voltages you ended up with on the EL84s.

Same here psychonoodler. Some people complain about the harshness of EL84 tubes but not me. I love'em! It's all a matter of the preamp values used to me. I love my 1993 Classic 50 410. I would never sell it!

Title: Re: deluxe reverb with el84s
Post by: phsyconoodler on December 16, 2013, 05:07:55 pm

Im at 420v on the plates and 400 on the screens. I have  a 5r4 rectifier for testing should have an nos 5y3 in later this week. With fixed bias it should be fine. I have it at -19v right now. I tried the stock pi values and I like it but it is a bit too grindy too early so gonna go with 470k grid and an 820 bias resistor