JJ 803S Gotta try em

[scotto]

I replaced the JJ PI tube that came in my Overtone with a balanced EH Gold Pin 12ax7 and it smoothed things out a good bit. Then I put another gold EH in V2 and a Tungsram in V1. The biggest improvement came from the Tungsram in V1. Very tight/articulate and musical. Tried an EH gold in V1 and quickly went back to the Tungsram. Seems like slightly lower output but much more defined and smooth sounding.

[markusw]

It was mentioned in this thread that most JJ ECC803S are microphonic.
In my last build I put a JJ ECC803S into PI position. So far it survived a couple of rehearsals.
Can I expect the tube to be fine or is it likely that it will go microphonic over time?


Peace,

Markus

[JD0x0]

It was mentioned in this thread that most JJ ECC803S are microphonic.
In my last build I put a JJ ECC803S into PI position. So far it survived a couple of rehearsals.
Can I expect the tube to be fine or is it likely that it will go microphonic over time?


Peace,

Markus

i put one in the PI of my amp too, it wasnt microphonic but i quickly switched it back to the tungsol RI that i had in there because i lost alot of bloom and those swirly harmonics

[markusw]

i put one in the PI of my amp too, it wasnt microphonic but i quickly switched it back to the tungsol RI that i had in there because i lost alot of bloom and those swirly harmonics

Thanks for you tip!

So far I didn't do any "tube optimisation". Will keep it in mind though to test a tung sol in the PI position.

Regards,

Markus

[David Root]

Anyone have any info on the Mullard and TAD 803s? I saw a couple of brief notes, but that's all. TADs are selected tubes so they probably won't do the fireworks display. Mullard's I don't know anything about.

[Structo]

Is the JJ 803S just a long plate 12ax7?

I can't really find much of a description.

[JD0x0]

Is the JJ 803S just a long plate 12ax7?

I can't really find much of a description.

yes.

From tube depot

The JJ/Tesla ECC803s is a hi-performance 12AX7 that has a spiral wound filament to reduce noise and hum. The construction is different from the JJ ECC83 in that the plates are more conventional, but have a special heat dissipating fin that serves to improve efficiency and gain. The plates of the tube are also "over-sized" (longer) as compared to most standard 12AX7 tubes. This over sized plate structure improves details in the bass and low mid-range responses. If you want that great JJ tone in a hi-performance package, then these are for you.

[David Root]

It was originally one of the so-called 10,000 hour life preamp tubes that Telefunken and others produced back in the day.

[crbowman]

I just put a couple of the ECC803s in 1 and 2 on my 70's build. So far I'm pretty happy with them. I had heard some concerns about long plates being noisy in the 2 (OD) position, but so far no problem.
And yes, they are just a long plate 12AX7.

[markusw]

I just put a couple of the ECC803s in 1 and 2 on my 70's build. So far I'm pretty happy with them. I had heard some concerns about long plates being noisy in the 2 (OD) position, but so far no problem.
And yes, they are just a long plate 12AX7.

Thanks for the information
Did you use JJs?

Anyone have any info on the Mullard and TAD 803s?

I just received some TAD 803s but didn't have time to test them so far.

[kd]

I'm wondering if the JJ 803's sounding good has anything to do with the test amp having an EL34 power section.

Ken

[crbowman]

I just put a couple of the ECC803s in 1 and 2 on my 70's build. So far I'm pretty happy with them. I had heard some concerns about long plates being noisy in the 2 (OD) position, but so far no problem.
And yes, they are just a long plate 12AX7.

Thanks for the information
Did you use JJs?

Anyone have any info on the Mullard and TAD 803s?

I just received some TAD 803s but didn't have time to test them so far.

I'm using the JJ's and reissue short bottle Tung-Sol 6L6's

[markusw]

I'm using the JJ's and reissue short bottle Tung-Sol 6L6's

Did you compare the Tung Sol 6L6's to Winged C?
So far I just used the Winged C. A pair of Tung Sol's is still waiting on my bench to be tested

[glasman]

I'm using the JJ's and reissue short bottle Tung-Sol 6L6's

Did you compare the Tung Sol 6L6's to Winged C?
So far I just used the Winged C. A pair of Tung Sol's is still waiting on my bench to be tested

I have been testing the short bottle TungSols and have found some issues with them getting noisy and then KABOOM. I guess Alan Philips (CarolAnn) has seen the same issue. I will say while they lasted (< 15 hours) they did sound good. I have also tested the TS 5881's and found no issues. I not tested the large bottle TungSols.

But for right now, I will stick with WC's, expensive but never had any issues with them.

Gary

[markusw]

I have been testing the short bottle TungSols and have found some issues with them getting noisy and then KABOOM. I guess Alan Philips (CarolAnn) has seen the same issue. I will say while they lasted (< 15 hours) they did sound good. I have also tested the TS 5881's and found no issues. I not tested the large bottle TungSols.

But for right now, I will stick with WC's, expensive but never had any issues with them.

Gary

Thanks for this information!
Think I will skip the test
"KABOOM" is kaboom in terms of pieces of glas flying around or kaboom in terms of just crapping out?