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Amp Internals 2

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neonogin View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote neonogin Quote  Post ReplyReply Direct Link To This Post Posted: 27 March 2022 at 11:20pm
What boots are you wearing ?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 28 March 2022 at 9:24am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Monitech Quote  Post ReplyReply Direct Link To This Post Posted: 28 March 2022 at 9:55am
The man had a hand in both ,change the dropper resistors and it will carry on for another 34 years 
phoenix out of the ashes
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jbl_man Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2022 at 2:19pm
Realistic / Radio shack / Altai / Soundlab MPA100.

Can't recall if this one has been posted before, but anyway, here we are, late 80's, first of the taiwan/chinesey PA amps.

Been sitting in a friends garage the past 25 years. Works fine, even the meters still light up.

Don't think this will do 4kw bridged into 2 ohms though.




Be seeing you.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lucasdude Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2022 at 2:34pm
Originally posted by jbl_man jbl_man wrote:

Realistic / Radio shack / Altai / Soundlab MPA100.

Can't recall if this one has been posted before, but anyway, here we are, late 80's, first of the taiwan/chinesey PA amps.

Been sitting in a friends garage the past 25 years. Works fine, even the meters still light up.

Don't think this will do 4kw bridged into 2 ohms though.






Nice. That's the one I used in the mid 90s to drive a pair of RCF CDs.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Static Age Quote  Post ReplyReply Direct Link To This Post Posted: 25 April 2022 at 4:21pm
Originally posted by jbl_man jbl_man wrote:

Realistic / Radio shack / Altai / Soundlab MPA100.

Can't recall if this one has been posted before, but anyway, here we are, late 80's, first of the taiwan/chinesey PA amps.

Been sitting in a friends garage the past 25 years. Works fine, even the meters still light up.

Don't think this will do 4kw bridged into 2 ohms though.





If got two of these hooked up to my DAB tuner in my workshop. Quite sturdy & they will put out slightly more than the rated power. I'm sure I heard someone say that they were made by Pyle in the US, no idea if that is true though. 
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Post Options Post Options   Thanks (1) Thanks(1)   Quote jbl_man Quote  Post ReplyReply Direct Link To This Post Posted: 25 April 2022 at 4:39pm
Was reading 31.9v per channel at onset of clipping into 8 ohms, which equates to 120w @ 8 ohms.

Says on the back panel "Taiwan",(Altai factory i believe), but these were sold in the USA under the Radio Shack brand, which might explain the US connection.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Elliot Thompson Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2022 at 1:25pm
Originally posted by jbl_man jbl_man wrote:

Was reading 31.9v per channel at onset of clipping into 8 ohms, which equates to 120w @ 8 ohms.

Says on the back panel "Taiwan",(Altai factory i believe), but these were sold in the USA under the Radio Shack brand, which might explain the US connection.


By the time Radio Shack embroidered this amplifier it was no longer popular to the masses. I recall Pyramid was toting this amplifier in the 1980's before Radio Shack added this amplifier to it's catalogue.
Amplifiers of such caliber were popular in small Israeli owned electronic stores in the mid to late 1980's. 

Best Regards, 
Elliot Thompson
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