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Old 15th April 2019, 02:36 PM   #1991
marconi118 is offline marconi118  Germany
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2A with the small chokes ins't it too much?
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Old 15th April 2019, 03:01 PM   #1992
vdi_nenna is online now vdi_nenna  United States
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Hey Dennis,

After I finish the 25W Schade feedback power amp, I'll be building one or two F4s.
Like to know your impressions on sound, at some point, between MoFo and F4.

I don't want to offend anyone (ZM) , but I think the MoFo sounds a lot like the M2.
I've never heard a F4 power amp.

Thanks,

Vince
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Old 15th April 2019, 03:11 PM   #1993
Zen Mod is online now Zen Mod  Serbia
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Old 15th April 2019, 03:18 PM   #1994
vdi_nenna is online now vdi_nenna  United States
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1:1 Jensen on MoFo input?
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Old 15th April 2019, 03:45 PM   #1995
Zen Mod is online now Zen Mod  Serbia
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Old 16th April 2019, 04:20 AM   #1996
nzlowie is offline nzlowie  Australia
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Hi all, been thinking of building the MoFo to run my mid/hf horns which are around 114db but was put off by the fact that I'd have to build a dedicated pre amp. (Brought a Aska Lender board set anyway).
I just read one of the post saying they got around 3 watts from the MoFo with normal preamp, eg low input. 3 watts would be plenty for me..... This would be cheaper than buying a 2A3 tube amp which was my other choice.

Currently have a DCB1 buffer driving my amps and boards + components coming to build the Korg and also Wayne's BA Linestage.

SS or tube????

Thanks
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Old 16th April 2019, 08:17 AM   #1997
jolintsai is offline jolintsai  Malaysia
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Guys,

If I'm using a linear unregulated PSU, how much ripple can MOFO tolerate before showing on my 100dB/w/m speaker? I'm planning for a monoblock PSU as follow:

Bridge --> 33,000UF --> 0.5R --> 33,000UF --> MOFO.

Would the above be sufficient? Based on rough calculation, ripple is about 70-100mVpp.

Thanks guys!
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Old 16th April 2019, 09:36 AM   #1998
Zen Mod is online now Zen Mod  Serbia
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you'll be good , maybe even lesser R in CRC

though , you can always resort to CLC

just solve it on the fly
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Old 16th April 2019, 09:55 AM   #1999
Dennis Hui is offline Dennis Hui  Canada
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Hi nzlowie,

My DAC output is 2V RMS so with a 8dB linestage I was getting a max of ~3W into 8
ohms.

Wayne's BA linestage has a gain of around 11dB and the same 2V RMS signal will get you around 6W.

Cheers,
Dennis
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Old 16th April 2019, 11:43 AM   #2000
nzlowie is offline nzlowie  Australia
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Thanks Dennis
That sounds like it should be more than enough, so Wayne's line stage will have enough current / voltage to drive the mofo? What about input impedance, any concerns there?

Looks like the mofo is the next build. Might do this instead of the 2A3 amp.

Any thoughts on this simple amp driving my horns? Killer or average?

Thanks again
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