| Look for EL33 PP structure circuit - Click HERE for Original Thread |
| RCA245 |
Can everybody help to offer? ;)
Thanks |
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| planet10 |
and the power supply
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| planet10 |
| quote: | Originally posted by leadbelly
he really means EL33 |
Oops... not a tube i've heard of before... same circuit would work, but with adjustment of cathode R & an OPT with a lot more pimary -- looks much more like an EL84 then an EL34.... i'm using the above as a basis for a PP amp with EL84s leveraged off a pair of Dynaco SCA35s
dave |
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| planet10 |
To continue... go looking for circuits for EL84/6BQ5, 6AQ5, 6V6, EL95, ELL80, adjust the cathode circuit and power supply as necessary....
dave |
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| RCA245 |
Thank you very much for the help of dave and leadbelly. :D
http://artifactaudio.com/EL33specs.JPG
Ask dave again. Please tell me?
In the webpage "Two valves in Push-Pull".
Va=250V
Vg2=250V
Rk=140 ohm
Vin=13V
I can change the circuit of this 6V6 below its Va , Vg2, Rk and Vin, make it become circuit of EL33 PP?
http://www2u.biglobe.ne.jp/~tossie/6V6-E.html
Make having 296V in the picture into 250V,
Rk =250 ohm is changed into 140 ohm,
Make with 18V into 13V.
Can become EL33 PP in this way?
Thanks.:D |
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| planet10 |
| quote: | Originally posted by RCA245
I can change the circuit of this 6V6 below its Va , Vg2, Rk and Vin, make it become circuit of EL33 PP?
http://www2u.biglobe.ne.jp/~tossie/6V6-E.html
Make having 296V in the picture into 250V,
Rk =250 ohm is changed into 140 ohm,
Make with 18V into 13V.
Can become EL33 PP in this way?
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pretty much... i'd put a CCS on the cathodes of the long tail pair and just use it as the phase splitter and gain stage (you might need a higher gain tube) -- this would eliminate the 1st 2 stages.
dave |
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| RCA245 |
| quote: | Originally posted by planet10
pretty much... i'd put a CCS on the cathodes of the long tail pair and just use it as the phase splitter and gain stage (you might need a higher gain tube) -- this would eliminate the 1st 2 stages.
dave [/B] |
Dave, thanks your replying.
Sorry ! What is CCS? :dead:
If use this circuit below, OK?
http://www.tubecity.com.tw/images/cir3.gif
Or change the 1st 2 stages (first 6sn7) into EF86 etc . high gain tube?
But change into high gain tube, so become bad linearly?
Thanks. |
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| planet10 |
| quote: | Originally posted by RCA245
Sorry ! What is CCS? :dead: |
Constant Current Source
That is the same circuit, different ouput tubes and details ...
| quote: | Or change the 1st 2 stages (first 6sn7) into EF86 etc . high gain tube?
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EF86 straffed in triode is excellent.
something like this is what i suggest (note similarities to PP1C above)
dave |
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| planet10 |
Gee, you beat me to that....
dave |
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| RCA245 |
| quote: | Originally posted by planet10
Constant Current Source
That is the same circuit, different ouput tubes and details ...
EF86 straffed in triode is excellent.
something like this is what i suggest (note similarities to PP1C above)
dave |
Hi Dave.
http://www.diyaudio.com/forums/atta...tamp=1113444357
Only is it all right to need two stage? ?
Could you tell me that needs one stage foremost?
Thanks |
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| planet10 |
| quote: | Originally posted by RCA245
Only is it all right to need two stage? ? |
If all you need is an amp, 2 stages work fine (input/phase splitter + output stage)
dave |
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| RCA245 |
Hi Yvesm .
:) Thank very much the suggestion that you offer . |
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