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Vintage Bogen MO-200A Stereo 100 Watts Vacuum Tube Power Amplifier ( Used)

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Vintage Bogen MO-200A Stereo 100 Watts Vacuum Tube Power Amplifier ( Used)

Post by HiFiLab on Fri Aug 07, 2015 5:12 am










Made In USA

Great sound. Clean and clear from deep bass up to extreme treble

Bogen MO-200A Tube Amplifier, 200WPC Mono
                                               100WPC Stereo.



Bogen built some of the most innovative tube amplifiers during the golden era of tube amplifiers during the 1950's and 1960's.
Bogen always had transformers that far exceeded the normal specifications for amplifiers sold through commercial channels.
This design consists of two almost separate amplifiers (common power transformer) each with it's own output transformer and push-pull-parallel set of 8417 tubes with 7247 drivers.
The inputs to the 7247 grids and output transformer secondaries are connected in parallel for 200 Watts per channel.
The amplifier can be rewired as a stereo amplifier, each channel with it's own output transformer and quartet of 8417 for 100 Watts per channel.



Chassis is very clean with only slight wear - an occasional scratch, no dents, no rust. There are a couple of very small paper labels still on the chassis.
Amplifier is sold in working condition and sounds very strong. You will be amazed how good this amp sounds.




Bogen MO-200A Audio Power Amplifier Specifications



Model

MO-200 / MO-200A

Tubes, Output

Eight 8417 beam power tubes

Tubes, Driver

Two 7247 dissimilar dual triodes  ( Upgraded to 12AX7)

Frequency Response

+/- 1 db, 8-50,000 Hz @ 1 watt

Power Output

100 watts, +/- 1 db, 21-50,000 Hz @5% or less THD  Per Channel

Input Terminations

RCA style input connection; Approx. 1 volt RMS input for full output.

Output Terminations

Screw Terminal Strip, Phenolic.
8 ohms
25VCT (3.125 ohms CT/0.78 ohm) use 4 ohm load
70VCT (24.5 ohms CT/6.125 ohms)

Made In USA



 



Comment:



The amplifier consists of two almost separate amplifiers, each with its own output transformer and push-pull-parallel set of 8417 tubes, and a 7247 driver. The inputs to the 7247 grids and the secondaries of the output transfomers are connected in parallel. Needless to say, an octet of matched 8417's, and a pair of matched 7247's would be essential for maximum performance.



If the input sections and output wiring are separated, the unit can be modified to be used as a dual channel power amplifier. Each channel of course has its own output transformer and push-pull-parallel set of 8417 tubes, and a 7247 driver. In such a case, each channel will have about 100 watts output. Both share the power supply.




Note :This amplifier is currently expertly wired for 100 WPC.Stereo and ( Upgraded 7247 tube to 12AX7)



Price : RM 3850
Contact Simon Ting 012-3612507


Last edited by HiFiLab on Fri Aug 07, 2015 5:16 am; edited 1 time in total (Reason for editing : coreection)

HiFiLab
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Post by HiFiLab on Mon Nov 02, 2015 7:12 pm

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Post by HiFiLab on Sat Jan 23, 2016 6:48 am

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Re: Vintage Bogen MO-200A Stereo 100 Watts Vacuum Tube Power Amplifier ( Used)

Post by alchemis on Sat Jan 23, 2016 10:32 am

this one 110v or 240v ?

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Re: Vintage Bogen MO-200A Stereo 100 Watts Vacuum Tube Power Amplifier ( Used)

Post by HiFiLab on Sat Jan 23, 2016 10:46 am

240 V, Malaysia voltage

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Post by HiFiLab on Fri Apr 29, 2016 3:02 am

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Post by HiFiLab on Mon Jan 28, 2019 6:48 pm

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Registration date : 2011-03-12

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