[AMRadio] National Knob
Does anyone happen to have a National catalog with their vernier tuning mechanisms in it? I need the number of the 3 National Velvet vernier knob and assembly. I actually need the product, but they seem to be very scarce. I just happen to think, maybe it's in an old Handbook! Thanks, Rick/K5IZ __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] National Knob
Hi Rick, It was probebly the PW dial which had the vernier built in. It was a 10:1 ratio. Sold fopr $7.95 in 1945. Other dials in the series were the PO-0 series which had the gear reduction in a vertical or horizontal arrangement behind the panel but used a similar looking dial. 73, John, W4AWM __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] National Knob
Rick, there is a Number 3 vernier, along with 9 other varieties on E-bay under National Vernier. No affiliation with the sellers, just FWIW item is at -- 290082212768 Jim WB2FCN - Original Message - From: Rick Brashear [EMAIL PROTECTED] To: AMRadio@mailman.qth.net Sent: Monday, February 12, 2007 11:14 AM Subject: [AMRadio] National Knob Does anyone happen to have a National catalog with their vernier tuning mechanisms in it? I need the number of the 3 National Velvet vernier knob and assembly. I actually need the product, but they seem to be very scarce. I just happen to think, maybe it's in an old Handbook! Thanks, Rick/K5IZ __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re:[AMRadio] National Knob
Does anyone happen to have a National catalog with their vernier tuning mechanisms in it? I need the number of the 3 National Velvet vernier knob and assembly. I actually need the product, but they seem to be very scarce. I just happen to think, maybe it's in an old Handbook! Thanks, Rick/K5IZ The original velvet vernier was black bakelite. It had 0-100 scale, and looked very similar to the old bakelite dials on 1920's broadcast radios, except that it has the planetary drive mechanism. That was known as the Type A dial. It came in two sizes, one about 4 in diameter, and a smaller size about 3 in diameter. After WW2 it was replaced with the type AM dial (type A - Metal). The planetary mechanism is identical, but the dial skirt is bright metal instead of black bakelite. It only comes in one size, about 3 in diameter. They also made a variation with a real vernier scale on it, like the scale on a vernier caliper. This allowed precise setting of the dial for frequency meters and similar applications. There is also a Type B Velvet Vernier, which has a small peep-hole scale and a smaller tuning knob, as well as a variable reduction ratio. These look similar to another type of early broadcast receiver dial. These use a friction drive against a small wheel, instead of the planetary drive mechanism. Don k4kyv __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
