Friedman BE50 schematic needed

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POTL
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Post by POTL »

Anybody have?

karul
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Post by karul »

BE50 improved clean v.135 switch fix
BE50 Deluxe V1.5 and
BE100
https://ampgarage.com/forum/viewtopic.php?f=9&t=31026


Schematic was done by some guy Patrice on SLOclone forum:
http://www.slocloneforums.com
If you want to register to this forum, there is a question - 'What is the name of Joey's favorite cat?'
Answer is: 21ap14ax3/4
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BE50 improved clean v.135 switch fix
BE50 improved clean v.135 switch fix
BE50 Deluxe V1.5
BE50 Deluxe V1.5
BE100
BE100

POTL
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Post by POTL »

Are these exactly current schemes?
I am confused by the voltage divider after the first cascade
68K / 10M
This gives a voltage drop of 24dB, the first stage is something like a treble booster with a gain of about 12dB, more like a lightweight heater and tone corrector.
I did not play friedman - does the HBE mode really give a small boost? I thought it would be a full fledged gain giving much more distortion.

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plush
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Post by plush »

Year 2019, yet still no input protection...

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POTL
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plush wrote:Year 2019, yet still no input protection...
Are you talking about this?
To be honest, I saw a lot of schemes for new models of amplifiers and pedals, and nowhere did I encounter protection at the input.
Perhaps this is overengineering.
opamp-input-Fig-01.png

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plush
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Post by plush »

POTL wrote:
plush wrote:Year 2019, yet still no input protection...
Are you talking about this?
To be honest, I saw a lot of schemes for new models of amplifiers and pedals, and nowhere did I encounter protection at the input.
Perhaps this is overengineering.
opamp-input-Fig-01.png
Nah, I was talking about protecting the meatbag, not the amp.

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Post by Optical »

POTL wrote:Are these exactly current schemes?
I am confused by the voltage divider after the first cascade
68K / 10M
This gives a voltage drop of 24dB, the first stage is something like a treble booster with a gain of about 12dB, more like a lightweight heater and tone corrector.
I did not play friedman - does the HBE mode really give a small boost? I thought it would be a full fledged gain giving much more distortion.
No. The 10M is to prevent pops from the relay switching. Look up stream

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Post by POTL »

Optical wrote:
POTL wrote:Are these exactly current schemes?
I am confused by the voltage divider after the first cascade
68K / 10M
This gives a voltage drop of 24dB, the first stage is something like a treble booster with a gain of about 12dB, more like a lightweight heater and tone corrector.
I did not play friedman - does the HBE mode really give a small boost? I thought it would be a full fledged gain giving much more distortion.
No. The 10M is to prevent pops from the relay switching. Look up stream
I was sealed, I meant the voltage divider 1M + 68K

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Post by Optical »

Yes the 1M/68k divider is correct.
The BE preamp is already fairly gainy and does not need much more push, the HBE boost is all it really needs.

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