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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 6:46 am 
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Here is the twist I mentioned. This is not a 6V6 amp. The power tubes are actually 6N6 from Russia. They are as good as the 6V6, may be better.

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 8:02 am 
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john8750 wrote:
Here is the twist I mentioned. This is not a 6V6 amp. The power tubes are actually 6N6 from Russia. They are as good as the 6V6, may be better.
That must be a typo because I don't see how you can say a 6N6 "may be better" than a 6V6. Better HOW?


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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 8:04 am 
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john8750 wrote:
Flipperhome wrote:
john8750 wrote:
IC. That is very evident in the performance of the Prince John. Its remarkable. Is there a better matchup than the 6BR8/6HB6 at reasonable cost? Don't want to get too far on this topic. Will start a new thread.
Well, I certainly don't think so, or else I'd have used those instead. :wink: That doesn't mean it's absolutely the 'best amp' possible but I think it's pretty close to, if not, the best 'low cost' all tube amp you can make.

I haven't simulated it but see no reason why you couldn't use the 6BR8 with the 6V6s too. It would just have less gain and, perhaps, need a 'preamp' of some sort to use with MP3 players/cellphones.


Thanks again Flip. Gives me some things to consider. I want to build another amp. I already have a 6V6, 5902, and the Prince John. And the Blumoon. Not that I need another. Maybe a SE like Peter is working on. He has a neat little power supply idea.
If it were me I'd go for 'more power' next time.


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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 8:21 am 
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Flipperhome wrote:
john8750 wrote:
Here is the twist I mentioned. This is not a 6V6 amp. The power tubes are actually 6N6 from Russia. They are as good as the 6V6, may be better.
That must be a typo because I don't see how you can say a 6N6 "may be better" than a 6V6. Better HOW?



I have not made that comparison. I read some reviews. Some liked the 6N6 better than the 6V6. I cant tell the difference.

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 8:24 am 
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More power is fine with me Flip. Any suggestions.
EL84- Dynaco ST70/EL34

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 10:09 am 
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john8750 wrote:
Flipperhome wrote:
john8750 wrote:
Here is the twist I mentioned. This is not a 6V6 amp. The power tubes are actually 6N6 from Russia. They are as good as the 6V6, may be better.
That must be a typo because I don't see how you can say a 6N6 "may be better" than a 6V6. Better HOW?

I have not made that comparison. I read some reviews. Some liked the 6N6 better than the 6V6. I cant tell the difference.
You need to say more than just "6N6" because the REAL 6N6 is a triode driver feeding a power triode internally connected as a direct coupled amplifier. Is that what you're comparing to a 6V6?


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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 10:18 am 
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john8750 wrote:
More power is fine with me Flip. Any suggestions.
EL84- Dynaco ST70/EL34
The most logical/safest progression would probably be the 807/6L6 (alternately the EL34, which takes a different bias) family. That was actually MY planned next amp (with 807s) but it got sidelined for the time being.


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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 5:24 pm 
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The tube says 6N6C. It should be an exact match for the 6V6, or so I was told.
I would like to know more about your next project.

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 8:43 pm 
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john8750 wrote:
The tube says 6N6C. It should be an exact match for the 6V6, or so I was told.
I would like to know more about your next project.

Yes John... those are the Russian 6V6 exact equivalent..
The real Russian correct name is 6P6S .. But in the Russian Cyrillic alphabet the "p" looks like an "n" and the "s" looks like a "c"
So in Russian a 6P6S looks like our alphabet 6n6c
But what ever... they are really GREAT tubes.
I love mine very much. Excellent sound... at least to my ears.

here's other info opinions:
http://www.tdpri.com/threads/6n6c-nos-r ... es.282423/

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 9:11 pm 
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john8750 wrote:
Pbpix wrote:
john8750 wrote:
I like it Peter and just bought one. Could take up till June 1st to get it.

There are tons more there on Ebay... look... perhaps some with speedier delivery.



I already ordered but not a big deal. Next project for me is the Heathkit FM-4.
And some speakers for the 300b amp, Blumoon. Next Month.

In case you want more for other amps.. for only $5 I reordered several.

I also ordered some low voltage buck-boost DC versions for filaments etc. ( 5 of them for $7.30)
https://www.ebay.com/itm/1-2-5-10-Boost ... aMgj8Z4q-A

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 9:50 pm 
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Hi Peter. I usually order at least two of anything I need. But only one power inverter.
Was wondering what 'non-insulated' means.

I have three sets of four each 6V6. The EH set has a bad tube, my fault. The Russian set and the 6V6G tubes both sound great. I like the coke bottles. Was planning on giving the EH set to my cuz. But since they have a problem, will give him the Russian set. But might get a new pair of the EH. Electro Harm?????

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 10:24 pm 
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john8750 wrote:
Hi Peter. I usually order at least two of anything I need. But only one power inverter.
Was wondering what 'non-insulated' means.

I have three sets of four each 6V6. The EH set has a bad tube, my fault. The Russian set and the 6V6G tubes both sound great. I like the coke bottles. Was planning on giving the EH set to my cuz. But since they have a problem, will give him the Russian set. But might get a new pair of the EH. Electro Harm?????

Hi John:

One power-inverter?
Are referring to these DC to DC boost modules?.. or something else?
Power inverters are (I thought) DC to AC or something like that.

Non- insulated?? .... I see "non-isolated"

EH is Electro Harmonics brand.

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 11:06 pm 
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Pbpix wrote:
john8750 wrote:
Hi Peter. I usually order at least two of anything I need. But only one power inverter.
Was wondering what 'non-insulated' means.

I have three sets of four each 6V6. The EH set has a bad tube, my fault. The Russian set and the 6V6G tubes both sound great. I like the coke bottles. Was planning on giving the EH set to my cuz. But since they have a problem, will give him the Russian set. But might get a new pair of the EH. Electro Harm?????

Hi John:

One power-inverter?
Are referring to these DC to DC boost modules?.. or something else?
Power inverters are (I thought) DC to AC or something like that.

Non- insulated?? .... I see "non-isolated"

EH is Electro Harmonics brand.


Sorry Peter. I keep forgettin you aint no hillbilly.
DC-DC power converter. The same one you directed me to on ebay.
OK, what does non-isolated mean?
Actually it is "Electro Harmonix' :roll:

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 11:09 pm 
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I ordered two new Russian 6V6's. I believe there are more available.
https://www.ebay.com/itm/SHIPS-FROM-USA ... 2749.l2648

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 11:40 pm 
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john8750 wrote:
I ordered two new Russian 6V6's. I believe there are more available.
https://www.ebay.com/itm/SHIPS-FROM-USA ... 2749.l2648

Sure Those Russian 6n6c/6p6s tubes are available lots.

here's some direct from Russia... a little cheaper considering no shipping:
https://www.ebay.com/itm/6P6S-6-6-6V6GT ... SwGJlZK-n6

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Thu 22, 2018 11:45 pm 
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john8750 wrote:

Sorry Peter. I keep forgettin you aint no hillbilly.
DC-DC power converter. The same one you directed me to on ebay.
OK, what does non-isolated mean?
Actually it is "Electro Harmonix' :roll:

Non-isolated... in this circuit I don't know as I'm unfamiliar with the schematic.

It takes DC in... somehow makes AC for a step-up transformer at 71khz then rectifying and filtering the DC out.
Somehow.
And so I don't what is or isn't isolated there.

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Fri 23, 2018 1:26 am 
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john8750 wrote:
The tube says 6N6C. It should be an exact match for the 6V6, or so I was told.
I would like to know more about your next project.
Ah, the "C" makes all the difference. Yes, that's the Soviet 'copy' of the 6V6.

The 807 amp I was planning to build is the one where I was going to use the VU meters to do double duty as bias indicators, hopefully (loosely) 'calibrated' so 50 mA reads "0" or "100%" I actually have most of the major parts, like tubes, sockets, bias pots, VU meters, multipole switch, etc., except the iron.

Attachment:
VU Meters.jpg
VU Meters.jpg [ 79.71 KiB | Viewed 1332 times ]


Attachment:
6L6 - 12SL7 - 6SN7 - bootstrap - build.jpg
6L6 - 12SL7 - 6SN7 - bootstrap - build.jpg [ 170.86 KiB | Viewed 1332 times ]


Attachment:
Case Low Boy3.jpg
Case Low Boy3.jpg [ 84.19 KiB | Viewed 1332 times ]


I wanted to use the 807s for history's sake (and the coolness factor) and that mandated the 6SN7 and the 6SL7 for (octal) consistency (and extra gain in an attempt to accommodate modern line levels). A modern (sic) updated version could use 6L6GCs, since the 807 is just the 6L6 in a different bottle, as well as alternates for the others like, say, a 12AX7 in lieu of the 6SL7 and the 6CG7 for the 6SN7.


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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Fri 23, 2018 1:29 am 
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john8750 wrote:
Hi Peter. I usually order at least two of anything I need. But only one power inverter.
Was wondering what 'non-insulated' means.....
"Non-insulated" means the output is not isolated from the input. I.e. it's not a substitute for a transformer.


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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Fri 23, 2018 5:46 am 
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I like that amp Flip. When are you planning on it? On the 807, where does that top cap connect to? I see you have made some changes to the amp from the original Williamson. Are you planning on using a preamp?

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 Post subject: Re: 6V6 amp project- with a twist
PostPosted: Mar Fri 23, 2018 5:51 am 
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Pbpix wrote:
john8750 wrote:
I ordered two new Russian 6V6's. I believe there are more available.
https://www.ebay.com/itm/SHIPS-FROM-USA ... 2749.l2648

Sure Those Russian 6n6c/6p6s tubes are available lots.

here's some direct from Russia... a little cheaper considering no shipping:
https://www.ebay.com/itm/6P6S-6-6-6V6GT ... SwGJlZK-n6



I like the price Peter, but don't want to wait that long to get them. I am going to give the Cuz two EH and two 6n6c tubes. I will make sure the amp sounds good with the placement. I need to get it finished, and get to other projects.

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