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The K40 Model 6 and later had the speech clipper board as an add-on board on the side of the radio, based on a later non TDA1220 chip Pro510 chassis (I have one of these). I can't say whether Model 5 or earlier ones did, but here is the schematics for the Model 6.

http://www.cbtricks.com/pub/secret_cb/vol_26/graphics/secret_cb_vol_26_pg63.pdf

Secret CB does not have any info after Model 6. There was an SSB radio too, I have never seen it, though.

I just looked at the schematics for Models 1-3, the add-on clipper board is not on these, so they must have used the Speech Clipper/Processor microphone with these earlier models. Schematics for Models 1, 2, 3, and 6 are in Secret CB Vol.26.

http://www.cbtricks.com/pub/secret_cb/vol_26/index.htm

<blockquote data-quote="NZ8N" data-source="post: 739977" data-attributes="member: 51368">The K40 Model 6 and later had the speech clipper board as an add-on board on the side of the radio, based on a later non TDA1220 chip Pro510 chassis (I have one of these).&nbsp; I can&#039;t say whether Model 5 or earlier ones did, but here is the schematics for the Model 6.<a href="http://www.cbtricks.com/pub/secret_cb/vol_26/graphics/secret_cb_vol_26_pg63.pdf" target="_blank">http://www.cbtricks.com/pub/secret_cb/vol_26/graphics/secret_cb_vol_26_pg63.pdf</a>Secret CB does not have any info after Model 6.&nbsp; There was an SSB radio too, I have never seen it, though.I just looked at the schematics for Models 1-3, the add-on clipper board is not on these, so they must have used the Speech Clipper/Processor microphone with these earlier models.&nbsp; Schematics for Models 1, 2, 3, and 6 are in Secret CB Vol.26.<a href="http://www.cbtricks.com/pub/secret_cb/vol_26/index.htm" target="_blank">http://www.cbtricks.com/pub/secret_cb/vol_26/index.htm</a></blockquote>

[QUOTE="NZ8N, post: 739977, member: 51368"] The K40 Model 6 and later had the speech clipper board as an add-on board on the side of the radio, based on a later non TDA1220 chip Pro510 chassis (I have one of these). I can't say whether Model 5 or earlier ones did, but here is the schematics for the Model 6. [URL]http://www.cbtricks.com/pub/secret_cb/vol_26/graphics/secret_cb_vol_26_pg63.pdf[/URL] Secret CB does not have any info after Model 6. There was an SSB radio too, I have never seen it, though. I just looked at the schematics for Models 1-3, the add-on clipper board is not on these, so they must have used the Speech Clipper/Processor microphone with these earlier models. Schematics for Models 1, 2, 3, and 6 are in Secret CB Vol.26. [URL]http://www.cbtricks.com/pub/secret_cb/vol_26/index.htm[/URL] [/QUOTE]

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