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[analogorgans] Re: S101 D amplifier

From: "Frank Evans" <evans@xxxxxxxxxxx>
To: <analogorgans@xxxxxxxxxxxxx>
Date: Tue, 18 Jul 2006 11:31:33 -0500

John
The S-101D is the same as all of the S-1XX amps that Rodgers built. It started 
with the S-100 then A, B, C, and the S-101 series. Each used a little "newer" 
parts but they were so very close to the same circuit that you would have to 
look really close to find a difference. In addition the S-101D had both output 
transistors on one heatsink on the end rather than 2 separate heatsinks. The 
amplifier is capable of 100 watts RMS if (IF) the speaker load is 4 ohms and it 
is driven to about 0.7 v RMS input. If the amp has not had headsink compound 
placed under the output transistors, (kinda like grease) allowing for a better 
transfer of heat the amplifier will self destruct within about 5-10 minutes of 
sustained 100 watt RMS output. That being said.... These amps never, really 
never operate at that level in the intended configuration. .
The S-101D will not provide any more power than your S-100s. Might check for an 
internal level control to increase the signal level to the amps. I suspect that 
the main problem might be the efficiency of the speakers. Being rated at 500 
watts they might need a pretty hefty signal to drive them. As far as the 
pinout, yes they are "plug and play".
Hope that helps.
Regards Frank Evans
  ----- Original Message ----- 
  From: John Webber 
  To: analog Organs 
  Sent: Tuesday, July 18, 2006 7:26 AM
  Subject: [analogorgans] S101 D amplifier


  Is there anyone on this list familiar with the Rodgers S101 D amp?  3 are 
being advertised on ebay and the seller rates the amp a 190 amps.  I bought 
large speakers rated at 500 watts for my 330 and the S100s are doing a fine job 
but the speakers could use a little more wattage.  The S101D shows the same 
5-pin plug as used on my 330 but is the pin-out the same?

  thanks for any help you can offer.

  john webber
  330

Follow-Ups:

[analogorgans] Re: S101 D amplifier
From: milton miller

[analogorgans] Re: S101 D amplifier
From: John Webber

References:
- [analogorgans] S101 D amplifier
  - From: John Webber

[analogorgans] Re: S101 D amplifier

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