B W Audio Phase Shift Network

Phase Shift Network - CE-Multiphase.com

http://www.ce-multiphase.com/img/phase-shift-network.pdf

AUDIO PHÁSn SHIFT The B&W Model 350, Type 2Q4, 90 Degree Audio Phase Shift Network has been designed for single sideband suppressed cprrier radiotelephone receiving and transmitting applications. The unit is designed to split any audio signal, within the range of 300 to 3000 cps, into two equal amplitude com—

What's Inside a B&W 2Q4/350 - Red Wave Radio

http://www.redwaveradio.com/4_85b6862fdf2eeefb_1.htm

Probably the best-know of the PSNs was the B&W 2Q4/350, made by Barker and Williamson. These units were housed in a metal tube shell the size of a 6J5, and gave a 90 degree phase shift (plus or minus 1.5 degree) over the audio range of 300-3000 Hz. Many SSB projects in the '50s were designed around the 2Q4/350.

Audio phase-shift network - Red Wave Radio

http://www.redwaveradio.com/5_6a4babd21e577105_1.htm

Hi, Anyone have the basic circuitry for an audio phase-shift network for use in a phasing type SSB e***r. What I am interested in is the old B&W Model 350 2Q4. I have the circuits for the modern phase-shift networks, but I have never seen the layout for the older (1950's) networks. The 2Q4 has been

Phasing_SSB_Transmitter

https://www.n6qwradiogenius.us/Phasing_SSB.html

This notably was in the form of a commercial audio phase shift network (PSN) manufactured by B&W and known as the Model 350 2Q4. James Millen also produced such a network; but it seemed to be less popular perhaps because the 2Q4 was packaged like an 8 Pin tube and simply plugged into a standard octal socket.

NOS B&W Model 350 Type 204 Audio Phase Shift …

https://www.ebay.com/itm/NOS-B-W-Model-350-Type-204-Audio-Phase-Shift-Network-Free-Shipping-/353422437074

Audio Polyphase Quadrature Phase Shift Network - QRZ Forums

https://forums.qrz.com/index.php?threads/audio-polyphase-quadrature-phase-shift-network.228425/

9H1FQ Ham Member QRZ Page. Hi all, We have lots of resources and circuit ideas about the polyphase quadrature audio phase shift network, like HA5WH, Weaver, Gingell Tayloe etc. But which is the ideal ? Which is the one that gives the best sideband rejection ? Which is the most used ? Like to hear from anyone who has built one. 9H1FQ, Dec 8, 2009.