EML 20B PREAMP

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happyrabbit

EML 20B PREAMP
« on: 31 Mar 2018, 11:26 pm »
Commissioned by Oliver Sayes.    Over a year in the making with a little help from FedEx  :green:

EML 20b / 10y - switchable
Coleman filament regulators
Transformer coupled outputs 
Mercury Rectifiers
Separated power supply 

See attached for more details.

the EML 20b is a beast.   

Dwight












 
« Last Edit: 1 Apr 2018, 03:52 am by happyrabbit »

FullRangeMan

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Re: EML 20B PREAMP
« Reply #1 on: 31 Mar 2018, 11:30 pm »
Wow rarely see a so powerfull supply in a preamp.
Mercury rectifiers peak tension reach many thousands volts.
Congratulations one of the best!
There is any headphone output?

A_shah

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Re: EML 20B PREAMP
« Reply #2 on: 31 Mar 2018, 11:54 pm »
Wow That is one Big Beauty ! thanks for sharing I hope those big Transformers are not a fire Hazard , Enjoy them , let us know how the pre-amp sounds ! :thumb:
Asghar

happyrabbit

Re: EML 20B PREAMP
« Reply #3 on: 3 Apr 2018, 02:06 am »
Fullrangedude,

No headphone jack.  The 20b’s are operated near 435v @ 45ma.  Health voltages for a preamp  :green:

http://www.emissionlabs.com/datasheets/EML20B.htm

a_shah,

One of the most capable preamps I have ever owned.   See attached for current setup.

Dwight




FullRangeMan

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Re: EML 20B PREAMP
« Reply #4 on: 3 Apr 2018, 02:17 am »
OK, let us know how many hours these EML tubes will lasts a long the years?

happyrabbit

Re: EML 20B PREAMP
« Reply #5 on: 16 Apr 2018, 01:13 am »
‘This tube is one of the lowest distortion tubes ever build’ -  Per EML.

This is the finest preamp tube..

Dwight


FullRangeMan

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Re: EML 20B PREAMP
« Reply #6 on: 16 Apr 2018, 01:31 am »
No prob distortion in tubes are good to ears,
the musicians call it hamonics...Do you have
seen the price from this EML20B?

« Last Edit: 16 Apr 2018, 05:56 am by FullRangeMan »

FullRangeMan

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Re: EML 20B PREAMP
« Reply #7 on: 16 Apr 2018, 06:03 am »

Man is there a train railway next to your house?

rodge827

Re: EML 20B PREAMP
« Reply #8 on: 16 Apr 2018, 11:14 am »
Sweet preamp Dwight!  :D

Do you have any specs on it?
I know specs are just what they are but a few basic ones would be good.

Input voltage?
Gain?
Output voltage?
Signal to noise ratio?
Etc...

Chris

happyrabbit

Re: EML 20B PREAMP
« Reply #9 on: 17 Apr 2018, 01:23 am »
Rodge827 - responded to your request.  Check email.  :thumb:

FRM - $600.  It’s a DHT preamp.   What can I say..cheaper than the ELROG stuff

   Great Northern Railway - aka BNSF. 

https://en.m.wikipedia.org/wiki/Great_Northern_Railway_(U.S.)

Dwight