Well, I’m not familiar with the 8670B amp, but I have run across the HP 8349B 2 to 20 GHz amps. ?According to a very knowledgeable friend, the 8349s were designed for driving mmWave multipliers. ?Not too impressive these days with output power of only around +20 dBm, but it was a big deal back in the 1970s to the 1990s. ?Now it’s a 4 by 4 mm MMIC for about $150. ?I bet those 8349s went for kilobucks back in the day. ?Sorry I couldn’t be of more help.
Jim Ford
Laguna Hills, California, USA
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On Feb 18, 2025, at 6:43?PM, F1EKU via groups.io <rfconsulting.fr@...> wrote:
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The picture to illustrate my previous remark...
<hp-8760b-k29-photo-2 - copie.jpg>
