Author Topic: SET sound with Push Pull Circuit (Read 9803 times)

rascal101 · « **on:** Aug 07, 2006 at 03:18 PM »

How do you get SET sound using Push Pull amp circuit? Through transformer (via special winding technique) or proprietary circuit. Any push pull designs you know that has SET-like sound.

s2kov · « **Reply #1 on:** Aug 07, 2006 at 09:35 PM »

why not use the true triode tube instead of penthode/tetrode?

boomjam · « **Reply #2 on:** Aug 07, 2006 at 10:42 PM »

I have a SET-sounding push-pull amp. It uses four big triode 845s in a monoblock push-pull config delivering 80wpc. Sound is fantastic.

rascal101 · « **Reply #3 on:** Aug 08, 2006 at 08:28 AM »

Quote from: s2kov on Aug 07, 2006 at 09:35 PM

why not use the true triode tube instead of penthode/tetrode?

Low power.

rascal101 · « **Reply #4 on:** Aug 08, 2006 at 09:10 AM »

Quote from: boomjam on Aug 07, 2006 at 10:42 PM

I have a SET-sounding push-pull amp. It uses four big triode 845s in a monoblock push-pull config delivering 80wpc. Sound is fantastic.

s2kov · « **Reply #5 on:** Aug 08, 2006 at 09:18 AM »

a thousand volt amp!

yan na lng rascal, nde low power pero SET sounding!

Quote from: boomjam on Aug 07, 2006 at 10:42 PM

I have a SET-sounding push-pull amp. It uses four big triode 845s in a monoblock push-pull config delivering 80wpc. Sound is fantastic.

ATJr. · « **Reply #6 on:** Aug 08, 2006 at 10:26 AM »

hey rascal,
contradiction in terms yan...

pp amp na set ang tunog!

punta ka sa diyaudio.com...dami doon..

rascal101 · « **Reply #7 on:** Aug 08, 2006 at 10:47 AM »

Quote from: 2ny on Aug 08, 2006 at 10:26 AM

hey rascal,
contradiction in terms yan... pp amp na set ang tunog! punta ka sa diyaudio.com...dami doon..

Iba kasi tunog nung SET na yan eh.

Dami nga sa DIYAudio di naman tunog SET. Baka meron ka diyan nakatabi.

s2kov · « **Reply #8 on:** Aug 08, 2006 at 11:38 AM »

gawa ka na lng ng clone st70 at lagyan mo ng triode mode switch!

iba pa rin nga lng tlga and SET!

JojoD818 · « **Reply #9 on:** Aug 09, 2006 at 10:58 AM »

Quote from: s2kov on Aug 08, 2006 at 11:38 AM

iba pa rin nga lng tlga and SET!

agree ako diyan.

ATJr. · « **Reply #10 on:** Aug 10, 2006 at 06:55 PM »

Quote

Iba kasi tunog nung SET na yan eh.

oo nga, kaya yung el84 set amp ko ginamit kong guitar amplifier ng anak kong nasa high school! ang gandang tumunog ng electric guitar ng anak ko!

RU9 · « **Reply #11 on:** Aug 11, 2006 at 09:05 AM »

Quote from: 2ny on Aug 10, 2006 at 06:55 PM

oo nga, kaya yung el84 set amp ko ginamit kong guitar amplifier ng anak kong nasa high school! ang gandang tumunog ng electric guitar ng anak ko!

Andrew of AMX also mentioned that a push-pull el84 with the right topology approaches the SET sound.
I have an AMX EL84 and I am happy with the sound.

rascal101 · « **Reply #12 on:** Aug 11, 2006 at 09:23 AM »

Ano stock tubes nung Dynaco ST-70? EL84 ba yun?

JojoD818 · « **Reply #13 on:** Aug 11, 2006 at 10:17 AM »

rascal,

depende. kung Dynaco ST-70, EL34 ang gamit nun. Kung EICO ST-70 naman, 7591 tubes ang gamit.

s2kov · « **Reply #14 on:** Aug 11, 2006 at 10:45 AM »

rascal,

i have an on-going project which is a cloned st70 using 6922 driver tubes for an officemate and since you're a technical guy and know how to read circuits, sabay ka na lng skin!

yan ay kung gusto mo st70!

rascal101 · « **Reply #15 on:** Aug 11, 2006 at 10:57 AM »

Thanks. Pag-iisipan ko muna.

JojoD818 · « **Reply #16 on:** Aug 11, 2006 at 05:49 PM »

Hindi na pinagiisipan yan.

Seriously, mas ok siguro kung papakinggan mo muna.

Quote from: s2kov on Aug 11, 2006 at 10:45 AM

rascal,

i have an on-going project which is a cloned st70 using 6922 driver tubes for an officemate and since you're a technical guy and know how to read circuits, sabay ka na lng skin!

yan ay kung gusto mo st70!

Andy, kamukha ba yan nun Curcio 6922 implementation o bago design mo?

Jagner · « **Reply #17 on:** Aug 11, 2006 at 07:16 PM »

Just curious... how do you define SET sound? There are different circuit topologies used for an SET type amp

with each topology having it's own signature sound.

s2kov · « **Reply #18 on:** Aug 12, 2006 at 02:03 PM »

mismo, si mang curcio!

Quote from: JojoD818 on Aug 11, 2006 at 05:49 PM

Andy, kamukha ba yan nun Curcio 6922 implementation o bago design mo?

JojoD818 · « **Reply #19 on:** Aug 12, 2006 at 02:09 PM »

Quote from: s2kov on Aug 12, 2006 at 02:03 PM

mismo, si mang curcio!

ay kaganda naman niyan manong Andy!

suave ang concensus sa mga nagpa-convert ng mga ST70 sa 6922. May triode switch din? Lapit na sa SET sound siguro pag naka triode mode.

Pics naman senyor.

s2kov · « **Reply #20 on:** Aug 12, 2006 at 02:17 PM »

lalagyan ko din ng triode mode! wala pa ko pics kc last thurday night pa lng ako nag start magbutas ng chassis eh!

yung orig st70 ko may pics na ko for the restoration and upgrade being done!

Quote from: JojoD818 on Aug 12, 2006 at 02:09 PM

ay kaganda naman niyan manong Andy! suave ang concensus sa mga nagpa-convert ng mga ST70 sa 6922. May triode switch din? Lapit na sa SET sound siguro pag naka triode mode.

Pics naman senyor.

ATJr. · « **Reply #21 on:** Aug 12, 2006 at 06:36 PM »

andy,

me links ka ba nung kay curcio? para makaliskisan....post mo rin yung st70 stact from scracth build mo ha?

markmlists · « **Reply #22 on:** Aug 12, 2006 at 08:19 PM »

Quote from: s2kov on Aug 08, 2006 at 11:38 AM

gawa ka na lng ng clone st70 at lagyan mo ng triode mode switch!

iba pa rin nga lng tlga and SET!

Senyor S2kov, ilang watts yang ST-70 pagnaka triode switch? salamat

s2kov · « **Reply #23 on:** Aug 12, 2006 at 11:48 PM »

no problemo!

http://www.curcioaudio.com/dynadr_3.htm#DYNACO%20STEREO%2070%20POWER%20AMPLIFIER

Quote from: TonyT on Aug 12, 2006 at 06:36 PM

andy,

me links ka ba nung kay curcio? para makaliskisan....post mo rin yung st70 stact from scracth build mo ha?

s2kov · « **Reply #24 on:** Aug 12, 2006 at 11:59 PM »

18watt!

mag true triode ka na lng!

Quote from: markmlists on Aug 12, 2006 at 08:19 PM

Senyor S2kov, ilang watts yang ST-70 pagnaka triode switch? salamat

ATJr. · « **Reply #25 on:** Aug 13, 2006 at 08:05 AM »

Quote from: s2kov on Aug 12, 2006 at 11:48 PM

no problemo!

http://www.curcioaudio.com/dynadr_3.htm#DYNACO%20STEREO%2070%20POWER%20AMPLIFIER

ah ok, cascode pala yan, so tignan nating ang pinagkaiba ng pentode input sa cascode input...hmmm..wonder how the 12AT7 will fare in that circuit....

JojoD818 · « **Reply #26 on:** Aug 13, 2006 at 08:52 AM »

Quote from: s2kov on Aug 12, 2006 at 02:17 PM

lalagyan ko din ng triode mode! wala pa ko pics kc last thurday night pa lng ako nag start magbutas ng chassis eh! yung orig st70 ko may pics na ko for the restoration and upgrade being done!

excellent, sana may review ka pag natapos na. kahit pics lang para enjoy tignan.

better yet mag start ka ng new thread about that amp, very interesting. sensya na sa OT po...

s2kov · « **Reply #27 on:** Aug 13, 2006 at 01:11 PM »

roy mottram has this VTA driver board for st70 using 12at7 that has good reviews from other users! unfortunately, i don't have the circuit to use to compare!

Quote from: TonyT on Aug 13, 2006 at 08:05 AM

ah ok, cascode pala yan, so tignan nating ang pinagkaiba ng pentode input sa cascode input...hmmm..wonder how the 12AT7 will fare in that circuit....

JojoD818 · « **Reply #28 on:** Aug 13, 2006 at 09:48 PM »

I was told that the Curcio boards, together with a triode-mode mod on the outputs can sound close to true SET amps.

odyopayl · « **Reply #29 on:** Aug 14, 2006 at 04:50 PM »

Quote from: JojoD818 on Aug 13, 2006 at 09:48 PM

I was told that the Curcio boards, together with a triode-mode mod on the outputs can sound close to true SET amps.

Ayos! Mag Tra-Triode na ako! Penthode is Penthode, Triode is Triode!