468 results in 0.0239 seconds.
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In my first post I wrote that all tubes mentioned were tested in the same amp, PI included.... -
Two more experiments:
1/ Ran an old beat up quad of EL34EHs in this amp and got 80W at 5% and 90W at 8%.
2/ Ran the 6L6EH quad in my amp...Leave a comment:
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They were the typical 470 Ohm resistors. In my amp they are 1k because sometimes I put there EL34s but still the same result.
...Leave a comment:
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I would also expect slight variations but not 20 or 30W difference. The two quads were brand new. Measured the current while at max power - all were conducting....Leave a comment:
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Some 6L6 observations
Hi,
The following observations concern only the power output of the tubes mentioned not how they sounded.
I had to retube and amp... -
Considering the Resonance circuit is usually there to give a 2x12 or 4x12 cab some "help" in the 80-120Hz range 250Hz looks like too high.Leave a comment:
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Here's a screenshot.
...Leave a comment:
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This LTP reminds me of MESA Dyna-Watt type of amp.
...Leave a comment:
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Thanks for the info so far. How true is that the 300W BLS (Zakk Wylde) version is based on the Proline?...Leave a comment:
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EVM12L versions - 200W vs 300W
Hi,
It's well known that the EVM12L has different versions and serial numbers so I was wondering:
1/ Has anyone listened to the... -
Thanks for the info!
It looks like at least 2" thick which makes it close to model T stack size but I really doubt I'll need...Leave a comment:
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Sunn model T output transformer choices
Hi,
I was wondering what would be a good choice for a Sunn model T output transformer build? I was considering the following Hammond transformers:... -
The scope has a 400Vpp rating (1:10) so I guess it was tested to work fine in that range.
No. I have two cheap PC scopes and this...Leave a comment:
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There are two versions of this PC scope. One is isolated (VDS1022I) the other is not (VDS1022). From what I see the schematic shows both version. For the...Leave a comment:
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Isn't this USB isolation from PC power and ground?
Schematic:
https://www.eevblog.com/forum/testge...h=900212;image...Leave a comment:
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I'm not into SMPS but I was wondering how safe will be to use one of those USB isolated PC scopes like this one for example:
https://www.ama...Leave a comment:
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It looks to me like the same amp - Orange Thunderverb 200. At least the power amp section has the same voltages and corresponds to the hand drawn schematic...Last edited by GainFreak; 12-02-2021, 11:51 AM.Leave a comment:
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I have one of these in front of me for retubing and I'm somewhat confused. What should be the 1 Ohm resistors (R1 and R5 according to the schematic above)...
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Actually there are several more sources (1M/33-47k voltage dividers) for the peak signal marked "P" before the CF going to the MPSA13 base.Leave a comment:
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Below is the original simul class OT data (part # 562003). Later the stack thickness was reduced and later (mark IV B for example, part # 562004R-1) they...Leave a comment:
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Ampeg SVT II Pro peak LED
Hi,
I have an SVT II Pro for preamp tubes replacement and when testing it with a regular guitar I noticed that the peak LED would start lighting...
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