Don't you just love the PC-2? They could have simply employed a regular 2-megohm resistor!
The Globe King 500 used those things expressly to produce hyellowie "communications quality" audio. After helping Roger, N4IBF(SK) rework his Globe King, I wrote an article in The AM Press/Exchange on how to improve the audio by substituting the couplettes with conventional R-C coupling components. Don't recall off the top of my head which issue, or whether or not it is posted on the
website.
The couplette link should be moved to the Online AM Handbook section.
Those things are rubbish right in the same category as tubes-on-pcboard technology.
BTW I recently acquired what appears to be a decent scanner, and when I get the time, will begin scanning the rest of the back issues of AMPX to post on the
website . I tested the OCR software that came with the scanner and it worked perfectly on a page of text, but haven't tried it yet with the master copy of a back issue. If the prepackaged "OCR-lite" software doesn't work out, I plan to purchase Iris-10 (made in Belgium), which is affordable and has gotten some good reviews.
Has anyone reading this tried Iris 10, or could recommend other OCR software for about the same price (~$110) that works well with low error rate? (I'm not too concerned about bells 'n whistles such as the ability to interpret cursive handwriting and exotic fonts).