From 1oldlens1 at ix.netcom.com Tue Apr 28 15:49:58 2026 From: 1oldlens1 at ix.netcom.com (Richard Knoppow) Date: Tue, 28 Apr 2026 12:49:58 -0700 Subject: [Test-Equipment] WTB Millen GDO 46706 LF coil In-Reply-To: References: Message-ID: <55cfea2d-8edf-4772-8edf-33db7e18400c@ix.netcom.com> I never knew this coil existed, never seen it advertised. Is the hcalibration chart anywhere on the web? Charts for the other extension coils are in the little handbook at BAMA (and elsewhere). I have one of these GDO but not the extension coils. Have to look again. The Millen GDO will test crystals, which some can't do. On 3/28/2026 10:53 AM, Dale H. Cook via Test-Equipment wrote: > Doug Hensley's post about his Millen GDO prompted me to post here about > mine. > > I own a vintage Millen Type 90651 GDO. Some years ago I purchases the > first four LF coils for it (46702, 46703, 46704, 46705). Millen sold > them individually and as a set, and they are not difficult to find. They > later introduced a fifth LF coil, the 46706, covering 165 - 225 kHz, and > I have not yet found one. I have had a search running on the auction > site for years with no hits. There were apparently fairly few of them > made. If any of you have a Millen 46706 LF coil to part with I am > interested in buying it. -- Richard Knoppow Los Angeles WB6KBL SKCC 19998 From n2lxm at juno.com Tue Apr 28 16:26:53 2026 From: n2lxm at juno.com (n2lxm at juno.com) Date: Tue, 28 Apr 2026 16:26:53 -0400 Subject: [Test-Equipment] WTB Millen GDO 46706 LF coil Message-ID: I too have a full set of the low frequency coils for my Millen ( tube and solid state )GDO's, along with the Ton Modulator and Dipping Wand. The 46706 coil would be a great find. N2LXM American Patriot Proud Father of Two U.S. Marines Semper Fy From radiotest at plymouthcolony.net Tue Apr 28 16:53:05 2026 From: radiotest at plymouthcolony.net (Dale H. Cook) Date: Tue, 28 Apr 2026 16:53:05 -0400 Subject: [Test-Equipment] WTB Millen GDO 46706 LF coil In-Reply-To: <55cfea2d-8edf-4772-8edf-33db7e18400c@ix.netcom.com> References: <55cfea2d-8edf-4772-8edf-33db7e18400c@ix.netcom.com> Message-ID: <93041a34-e0db-4439-8dc8-fbd198cdc1c8@plymouthcolony.net> On 28 Apr 2026 3:49 pm, Richard Knoppow wrote: > I never knew this coil existed, never seen it advertised. Is the > hcalibration chart anywhere on the web? I have never seen one online. I have never seen one on the extensive James Millen Society site. I believe that I have a photocopy of the 46706 chart, but at the moment it is buried. When I next get into my storage area I will try to find it. -- Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA https://plymouthcolony.net/starcity/radios/