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A WE-91B project
A WE-91B project
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Old 16th January 2018, 01:44 AM   #21
jerrylong is offline jerrylong  China
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Power PCB
21.JPG
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Old 24th January 2018, 02:38 AM   #22
jerrylong is offline jerrylong  China
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The PCB is here
IMG_0591.JPG
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Old 29th January 2018, 08:45 AM   #23
jerrylong is offline jerrylong  China
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Here is the chasiss
33.jpg

34.jpg
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Old 30th January 2018, 11:48 AM   #24
Khaleesi is offline Khaleesi  Australia
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Quote:
I want to keep the first 310A to keep the original circuit as possible, and add a attenuator between the pre and 91B
You are going to add an attenuator to reduce the signal because you are going to use a step up transformer in the next stage which would otherwise cause overload??

Please correct me if I am wrong.

Last edited by Khaleesi; 30th January 2018 at 11:51 AM.
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Old 1st February 2018, 03:05 AM   #25
jerrylong is offline jerrylong  China
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No I just want to add an attenuator between the pre and WE-91B, I wll not use a step-up trans in the Input of the WE-91B
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Old 1st February 2018, 11:48 AM   #27
JOHNNYCR100 is offline JOHNNYCR100  Abu Dhabi
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Default Nice amp sir

Hi there Jerry, thanks for shareing, do you intend a WE type preamp to keep the synergy?, newbee question -but a modern/retro We system seems a great idear - how much like the origional would this sound like (another newbee question)- Would you need horns (Sato horns?) to finish the effect, I say this as i once heard a WE amp with horns and i never forgot the sound (road to Damascus experence)

Cheers Johnny
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Old 2nd February 2018, 12:34 AM   #28
jerrylong is offline jerrylong  China
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Hi Jonnny, thanks for noticing this project. I will use my AudioNote M10 (clone one) with this WE-91B to see the effect first. I have a TAD2402 horns(sensitivity is 97dB), I think it will be good for the WE-91B.

2018-02-02 092714.jpg
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Old 2nd February 2018, 04:00 AM   #29
JOHNNYCR100 is offline JOHNNYCR100  Abu Dhabi
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Default Nice horns!

Hi Jerry,

Love those horns, I have been reading about the history of WE amplification ( inspired by your build somewhat) but the origin WE amp used for cinema amplification apparently (so I read) only went to 15 Khz, amp makers traffomatic claim the have a modern WE amps with none of the high frequency restrictions but to in house output transformers, is this embedded in your WE inspired approach?, assuming it is could you give any more info on the output transformers you used please.

Maney thanks and well done.
Regards Johnny
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Old 2nd February 2018, 10:30 AM   #30
jerrylong is offline jerrylong  China
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I will make all the transfomers in this project include OPT, I am still designing it now
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