DOWNLOAD: SimpleTubeAudioOsc
This month on Preservation Sound Radio: nine side-filling tracks from 1970 thru 1986, all from…
This month's show airs Tuesday 2.20.24 at 8:30PM -11:25PM EST on WPKN 89.5 FM in…
The first Preservation Sound Radio program of 2024 will air Tuesday January 16 at 8:30PM…
As aired 8:30PM-11:30PM 12.19.23 on WPKN 89.5 FM Bridgeport. Enjoy. PSR DEC2023 sequence 1. Click…
Tonight 11.21.23 8:30 PM EST: special advance broadcast of the P/S Winter 2024 Mixtape. Catch…
Here's the tracklist for the 2023 Preservation Sound Summer Mixtape, to be broadcast 8:30PM EST…
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The 6SN7 is a highly desireable tube and should not be used frivolously.
Plus, why on earth would anyone build a tube audio oscillator when HP 200s and their clones are widely available, cheap, and superb? Coals to Newcastle and all that.
That Collins transmitter on the cover would be worth a lot of money today. So would the receiver off on the right.
Note also in this oscillator, the frequency setting element is a pair of pots rather than a capacitor or PTO/inductor. The frequency stability is going to be terrible. remember, the Wien bridge only oscillates when gain is exactly at a certain figure. Commercial audio oscillators were of the heterodyne type until Dave and Bill figured out how to use a light bulb as a stabilizing element. This made them multimillionaires and built an electronic empire that lasted until the Broad Restructuring and the spinoff of Agilent.