[R-390] Amplification of .01 cap choice

[Perry Sandeen]

Hi Gang,

I chose the .01 ceramics for two reasons.  One is that is what Hammarlund used them in the later
models to replace the .01’s and .022 BBOD’s.  Secondly Chuck Ripple said in one of the Pearl’s
post to use .01’s on 455Khz and above and film types on the audio.  I figured he knew what he was
talking about.

One reason not to use ceramics for audio bypass applications is that they will "sing" from the
audio amplitude changes on the B+, not a desirable characteristic to have in a receiver.

One thing I learned while working at Hallicrafters in the mid 60’s when they were making ecm
equipment was that as long as the part had been mil-certified, that the bean counters made sure
that A) they used whatever was cheapest or B) what they had on hand or were using in other
products to achieve volume pricing.

Regards, Perrier






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