Quasimodo results (ONLY)

[rhthatcher]

Hello

Did a search on this thread, the original Quasi thread and on Google…found an inquiry, but no results for a Quasi test

I’m looking for Quasimodo info on the Avel Y236651 transformer?

I used this same transformer in a build I’m trying to solve a noise issue in. Hoping someone else might have resorted to using it over an Antek or similar with the supply shortage.

I haven’t had luck finding info on it and don’t have the Quasi board or ability to use a scope right now.

Any chance anyone has the Quasi information on it?

It would be a big help.

Thanks

https://www.diyaudio.com/community/...asimodo-test-jig.243100/page-101#post-6424902

post 2015


18R works like a champ if you’re using independent secondaries and Cx 10nF and Cs 150nF

 

[chromenuts]

Thankyou rhthatcher!!!

I found some 10nF I ordered extra of for my Bi Amp crossovers

Digging desperately through boxes of parts trying to find 150pf…no luck so far

Either way…step in the right direction

Thank you!

 

[Decek]

Hi,

 

[myleftear]

Hi,

If I got it right, it is a tiny littly bit overdamped…
What values?

 

[Plott]

Hi,
did someone happen to measure the Antek 3218 with the primaries in series (230v)? For 115v I find results in the range of 10 to 12 ohms, would it be ok for 230v too? Thanks in advance.

 

[ranshdow]

Hi,
did someone happen to measure the Antek 3218 with the primaries in series (230v)? For 115v I find results in the range of 10 to 12 ohms, would it be ok for 230v too? Thanks in advance.

I didn’t put the primaries in series, but I did a read with open primaries, and there was a slight ring at 10R under that condition. So more damping than when shorted (10R-12R range, or anything less than 22R really). I assume whatever trend prevails with other trafos when the primaries are wired in series vs. in parallel would apply here.

 

[Plott]

I didn’t put the primaries in series, but I did a read with open primaries, and there was a slight ring at 10R under that condition. So more damping than when shorted (10R-12R range, or anything less than 22R really). I assume whatever trend prevails with other trafos when the primaries are wired in series vs. in parallel would apply here.

Many thanks! The 4225 works fine with 15R @115/230, so this seems to be the trend.

 

[Kokanee]

Hello to All,
Hopefully following thread rules for posting.

I do not have a QModo/Oscope. Would anyone have a test done on an Antek 3230 or 3232, 300VA, 115V primaries transformer's. l have reviewed the results of all the Antek test posted in the results thread, and I am thinking that Cx=10nF, Cs=150nF, Rs=12-18 ohm, will be close. Thanks in advance for the help.
Regards
MM

 

[myleftear]

Toroidy TS50VA 2 x 18 V

Secondaries parallel:
Cx 10nF
Cs 150nF
Rs 12.8 R

Secondaries in series:
Cx 10nF
Cs 150nF
Rs 23.1 R

Secondaries independent:
Cx 10nF
Cs 150nF
Rs 19.8 R

 

[myleftear]

Toroidy TS50VA 2 x 15 V

Secondaries parallel:
Cx 10nF
Cs 150nF
Rs 18 R

Secondaries in series:
Cx 10nF
Cs 150nF
Rs 44 R

Secondaries independent:
Cx 10nF
Cs 150nF
Rs 13.8 R

 

[johan]

Indel TST 50/001 230V/8V 50VA

Cx 4.7 nF
Cs 150 nF (100 - 330 nF works fine)
Rs 19 Ω

 

[SGregory]

Avel Lindberg Y236661
Secondaries independent:
Cx 10nF
Cs 150nF
Rs 13.5 R

 

[Mikerodrig27]

Antek AN-5230 500VA

Cx 10nf
Cs150nf
Rs 9R

Antek AN-5428 500VA

Cx 10nf
Cs150nf
Rs 10R

Antek AS-4218

Cx 10nf
Cs150nf
Rs 10R

10R-12R Works great for all for these looking at the oscilloscope

 

[SGregory]

Antek AS-3220

Cx = 10pF
Cs = 150pF
Rs = 10R

 

[Monk55]

Toroidy audio grade 50va, 120v primary with 2x100v secondaries:
Cx 10nF
Cs 150nF
Rs 39ohm

 

[AVWERK]

Plitron #200406
VA 750
2 X 115 VAC
2 X 38 VAC

Cx - .01uf
Cs -.15uf
R- 15-16R

 

[AVWERK]

GAS thoebe preamp
transformer markings- 430007D. swe

Cx - .01uf
Cs - .15uf
Rs - 21.3 R

 

[ranshdow]

Triad Magnetics VPT36-690: 115VAC to 2 x 18VAC, 25VA

Cx 10nF
Cs 150nF
Rs 180R (130-180R ok)

Antek AS-3428: 115VAC to 2 x 28VAC, 2 x 15VAC, 300VA

28VAC secondaries (blue-green)

Cx 10nF
Cs 150nF
Rs 30R (up to 47R ok)

15VAC secondaries (brown-brown)

Cx 10nF
Cs 150nF
Rs 4R1-4R7*

*not as confident about this last one, that's a lot of shunting

 

[rhthatcher]

Hammond 182G18

Cx 10nF
Cs 150nF
Rs 10-20R

 

[neric34]

Torroidy 500VA, 240V primary, dual 18V secondaries

Cx: 10nF
Cs: 150nF
Rs: 7Ω / 7Ω

Hi,
For Torroidy 500VA transformer, is it an AUDIO GRADE or a STANDARD GRADE ?
Thank you.