<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div>As to the bare wire covered with sleeve, one should remember the cost advantage at the time the kit was built. In quantity, delivering bare wire for a kit served a variety of uses in the kit. these included ground jumpers on tube sockets, shorting adjacent terminals on switches and making jumpers on the single sided circuit boards of the day. I use bare wire covered with teflon tubing these days.</div><div>Al</div><div>WB9UVJ<br></div><div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 13px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Wednesday, March 7, 2018 7:17 PM, "heath-request@puck.nether.net" <heath-request@puck.nether.net> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div dir="ltr">Send Heath mailing list submissions to<br></div><div dir="ltr"> <a ymailto="mailto:heath@puck.nether.net" href="mailto:heath@puck.nether.net">heath@puck.nether.net</a><br></div><div dir="ltr"><br></div><div dir="ltr">To subscribe or unsubscribe via the World Wide Web, visit<br></div><div dir="ltr"> <a href="https://puck.nether.net/mailman/listinfo/heath" target="_blank">https://puck.nether.net/mailman/listinfo/heath</a><br></div><div dir="ltr">or, via email, send a message with subject or body 'help' to<br></div><div dir="ltr"> <a ymailto="mailto:heath-request@puck.nether.net" href="mailto:heath-request@puck.nether.net">heath-request@puck.nether.net</a><br></div><div dir="ltr"><br></div><div dir="ltr">You can reach the person managing the list at<br></div><div dir="ltr"> <a ymailto="mailto:heath-owner@puck.nether.net" href="mailto:heath-owner@puck.nether.net">heath-owner@puck.nether.net</a><br></div><div dir="ltr"><br></div><div dir="ltr">When replying, please edit your Subject line so it is more specific<br></div><div dir="ltr">than "Re: Contents of Heath digest..."<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">Today's Topics:<br></div><div dir="ltr"><br></div><div dir="ltr"> 1. Re: Bare vs Insulated (Mike Bryce)<br></div><div dir="ltr"> 2. Inductor Values (Doug & Kathy Davies)<br></div><div dir="ltr"> 3. Re: HW-101 VFO - more (Kenneth G. Gordon)<br></div><div dir="ltr"> 4. Re: Inductor Values (Doug & Kathy Davies)<br></div><div dir="ltr"> 5. Re: Inductor Values (ChrisIwata)<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">----------------------------------------------------------------------<br></div><div dir="ltr"><br></div><div dir="ltr">Message: 1<br></div><div dir="ltr">Date: Wed, 7 Mar 2018 12:38:32 -0500<br></div><div dir="ltr">From: Mike Bryce <<a ymailto="mailto:prosolar@sssnet.com" href="mailto:prosolar@sssnet.com">prosolar@sssnet.com</a>><br></div><div dir="ltr">To: Larry Sheldon <<a ymailto="mailto:larrysheldon@cox.net" href="mailto:larrysheldon@cox.net">larrysheldon@cox.net</a>><br></div><div dir="ltr">Cc: <a ymailto="mailto:heath@puck.nether.net" href="mailto:heath@puck.nether.net">heath@puck.nether.net</a><br></div><div dir="ltr">Subject: Re: [Heath] Bare vs Insulated<br></div><div dir="ltr">Message-ID: <<a ymailto="mailto:4A49BC5E-9C59-42C6-8D30-4C4E4D9EA4EB@sssnet.com" href="mailto:4A49BC5E-9C59-42C6-8D30-4C4E4D9EA4EB@sssnet.com">4A49BC5E-9C59-42C6-8D30-4C4E4D9EA4EB@sssnet.com</a>><br></div><div dir="ltr">Content-Type: text/plain; charset=utf-8<br></div><div dir="ltr"><br></div><div dir="ltr">It?s easier to do especially when the distance between the two points are short.<br></div><div dir="ltr"><br></div><div dir="ltr">stripping the ends off both ends of a 1-2? wire is a bear.<br></div><div dir="ltr"><br></div><div dir="ltr">but!<br></div><div dir="ltr"><br></div><div dir="ltr">solder one end, slip on the tubing and solder other end.<br></div><div dir="ltr"><br></div><div dir="ltr">simple!<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">Mike, WB8VGE<br></div><div dir="ltr">www.theheathkitshop.com<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">> On Mar 7, 2018, at 12:07 AM, Larry Sheldon <<a ymailto="mailto:larrysheldon@cox.net" href="mailto:larrysheldon@cox.net">larrysheldon@cox.net</a>> wrote:<br></div><div dir="ltr">> <br></div><div dir="ltr">> <br></div><div dir="ltr">> <br></div><div dir="ltr">> On 3/6/2018 10:53, Doug & Kathy Davies wrote:<br></div><div dir="ltr">>> I notice in many of the Heathkit manuals they say to use bare wire with sleeving added. Why not just use insulated wire, either solid or stranded? Is there a 'scientific' reason for this? Just curious.<br></div><div dir="ltr">> <br></div><div dir="ltr">> I do not actually "know" anything, but I suspect a couple of things centered on the expense failure rates of nicked covered wire.<br></div><div dir="ltr">> <br></div><div dir="ltr">> <br></div><div dir="ltr">> -- <br></div><div dir="ltr">> "Eppur si muove"<br></div><div dir="ltr">> From Larry's Cox account.<br></div><div dir="ltr">> _______________________________________________<br></div><div dir="ltr">> Heath mailing list<br></div><div dir="ltr">> <a ymailto="mailto:Heath@puck.nether.net" href="mailto:Heath@puck.nether.net">Heath@puck.nether.net</a><br></div><div dir="ltr">> <a href="https://puck.nether.net/mailman/listinfo/heath" target="_blank">https://puck.nether.net/mailman/listinfo/heath</a><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">------------------------------<br></div><div dir="ltr"><br></div><div dir="ltr">Message: 2<br></div><div dir="ltr">Date: Wed, 7 Mar 2018 09:38:51 -0800<br></div><div dir="ltr">From: "Doug & Kathy Davies" <<a ymailto="mailto:dkdavies3@gmail.com" href="mailto:dkdavies3@gmail.com">dkdavies3@gmail.com</a>><br></div><div dir="ltr">To: <a ymailto="mailto:Heath@puck.nether.net" href="mailto:Heath@puck.nether.net">Heath@puck.nether.net</a><br></div><div dir="ltr">Subject: [Heath] Inductor Values<br></div><div dir="ltr">Message-ID:<br></div><div dir="ltr"> <CADrcw9nXoWxnsFj5BcXgHZMXeESxgKT2kvi5c+<a ymailto="mailto:ErxuJ2Yfye3g@mail.gmail.com" href="mailto:ErxuJ2Yfye3g@mail.gmail.com">ErxuJ2Yfye3g@mail.gmail.com</a>><br></div><div dir="ltr">Content-Type: text/plain; charset="utf-8"<br></div><div dir="ltr"><br></div><div dir="ltr">I'm in the process of completing a previously partially built Heathkit<br></div><div dir="ltr">DX-60B transmitter. Yesterday, I was assembling the low-pass filter and<br></div><div dir="ltr">found that two of the coil were missing. Figuring I could wind my own, I<br></div><div dir="ltr">got some enameled wire and wound a bunch on a form that looked to be close<br></div><div dir="ltr">to the right diameter. I measured the value with my AADE L/C meter and<br></div><div dir="ltr">finding that it was too high, started to remove turns until I got to the<br></div><div dir="ltr">correct value which was 0.32 uh in this case. Just for grins, I put the<br></div><div dir="ltr">meter on one of the kit-supplied "green marked" coils that was, according<br></div><div dir="ltr">to the manual, supposed to be 0.44uh. It measured 0.098uh. Since there are<br></div><div dir="ltr">two of these, I measured the other one and it' value was 0.094uh. I also<br></div><div dir="ltr">measured the other coils and they too were not even close to the manual<br></div><div dir="ltr">values. Now this has me puzzled. Why would Heath put coils in the kit<br></div><div dir="ltr">that are way out of spec. or, does it really matter for this application?<br></div><div dir="ltr"><br></div><div dir="ltr">Doug<br></div><div dir="ltr">VE7DRF<br></div><div dir="ltr">-------------- next part --------------<br></div><div dir="ltr">An HTML attachment was scrubbed...<br></div><div dir="ltr">URL: <<a href="https://puck.nether.net/pipermail/heath/attachments/20180307/0ee17057/attachment-0001.html" target="_blank">https://puck.nether.net/pipermail/heath/attachments/20180307/0ee17057/attachment-0001.html</a>><br></div><div dir="ltr"><br></div><div dir="ltr">------------------------------<br></div><div dir="ltr"><br></div><div dir="ltr">Message: 3<br></div><div dir="ltr">Date: Wed, 07 Mar 2018 08:27:25 -0800<br></div><div dir="ltr">From: "Kenneth G. Gordon" <<a ymailto="mailto:kgordon2006@frontier.com" href="mailto:kgordon2006@frontier.com">kgordon2006@frontier.com</a>><br></div><div dir="ltr">To: john <<a ymailto="mailto:johnmb@nc.rr.com" href="mailto:johnmb@nc.rr.com">johnmb@nc.rr.com</a>><br></div><div dir="ltr">Cc: <a ymailto="mailto:Heath@puck.nether.net" href="mailto:Heath@puck.nether.net">Heath@puck.nether.net</a><br></div><div dir="ltr">Subject: Re: [Heath] HW-101 VFO - more<br></div><div dir="ltr">Message-ID: <<a ymailto="mailto:5AA012ED.20270.A457C50@kgordon2006.frontier.com" href="mailto:5AA012ED.20270.A457C50@kgordon2006.frontier.com">5AA012ED.20270.A457C50@kgordon2006.frontier.com</a>><br></div><div dir="ltr">Content-Type: text/plain; charset=US-ASCII<br></div><div dir="ltr"><br></div><div dir="ltr">On 7 Mar 2018 at 6:35, john wrote:<br></div><div dir="ltr"><br></div><div dir="ltr">> <br></div><div dir="ltr">> I built an HW101 back in...hmmm 77 or 76 maybe? I do recall the VFO as <br></div><div dir="ltr">> being one of the most challenging areas. By the end of the assembly it <br></div><div dir="ltr">> was kind of a web of flying leads inside the aluminum box.<br></div><div dir="ltr"><br></div><div dir="ltr">Oh, yes. It looks very messy...<br></div><div dir="ltr"><br></div><div dir="ltr">> Neat rig though!<br></div><div dir="ltr">> <br></div><div dir="ltr">> John K5MO<br></div><div dir="ltr"><br></div><div dir="ltr">Yes.<br></div><div dir="ltr"><br></div><div dir="ltr">I have always considered that VFO to be an unusually good one. The tuning capacitor is <br></div><div dir="ltr">actually a temperature-compensating type. The next time you look at it, notice the different <br></div><div dir="ltr">colored plates.<br></div><div dir="ltr"><br></div><div dir="ltr">The drift in the entire system is good enough for modern use after a good warm up.<br></div><div dir="ltr"><br></div><div dir="ltr">It is no wonder the HW-101 was one of the most popular kits Heathkit ever produced.<br></div><div dir="ltr"><br></div><div dir="ltr">Ken W7EKB<br></div><div dir="ltr"><br></div><div dir="ltr">---<br></div><div dir="ltr">This email has been checked for viruses by Avast antivirus software.<br></div><div dir="ltr"><a href="https://www.avast.com/antivirus" target="_blank">https://www.avast.com/antivirus</a><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">------------------------------<br></div><div dir="ltr"><br></div><div dir="ltr">Message: 4<br></div><div dir="ltr">Date: Wed, 7 Mar 2018 14:51:04 -0800<br></div><div dir="ltr">From: "Doug & Kathy Davies" <<a ymailto="mailto:dkdavies3@gmail.com" href="mailto:dkdavies3@gmail.com">dkdavies3@gmail.com</a>><br></div><div dir="ltr">To: <a ymailto="mailto:Heath@puck.nether.net" href="mailto:Heath@puck.nether.net">Heath@puck.nether.net</a><br></div><div dir="ltr">Subject: Re: [Heath] Inductor Values<br></div><div dir="ltr">Message-ID:<br></div><div dir="ltr"> <CADrcw9mQfYNAcdVzNDuOqYxZVO8GREoM=<a ymailto="mailto:pv3O1dMgBq1P7rRng@mail.gmail.com" href="mailto:pv3O1dMgBq1P7rRng@mail.gmail.com">pv3O1dMgBq1P7rRng@mail.gmail.com</a>><br></div><div dir="ltr">Content-Type: text/plain; charset="utf-8"<br></div><div dir="ltr"><br></div><div dir="ltr">I ran the numbers through an on-line inductance calculator using the stock<br></div><div dir="ltr">Heathkit coils. They all came out exactly what the manual values said they<br></div><div dir="ltr">should be. I then wound a few turns of enameled wire on the form I have<br></div><div dir="ltr">and, after playing with the turns, I achieved a value of 0.318 uH. The<br></div><div dir="ltr">manual value is 0.320 uH so I think I'm good to go with those I wound.<br></div><div dir="ltr">Looks like I won't be relying on the AADE L/C meter.<br></div><div dir="ltr"><br></div><div dir="ltr">The coils are for the low pass filter in a Heathkit DX-60B transmitter.<br></div><div dir="ltr">The schematic can be viewed here: <a href="https://www.vintage-radio.info/heathkit/" target="_blank">https://www.vintage-radio.info/heathkit/</a><br></div><div dir="ltr"><br></div><div dir="ltr">Doug<br></div><div dir="ltr">VE7DRF<br></div><div dir="ltr"><br></div><div dir="ltr">On Wed, Mar 7, 2018 at 9:38 AM, Doug & Kathy Davies <<a ymailto="mailto:dkdavies3@gmail.com" href="mailto:dkdavies3@gmail.com">dkdavies3@gmail.com</a>><br></div><div dir="ltr">wrote:<br></div><div dir="ltr"><br></div><div dir="ltr">> I'm in the process of completing a previously partially built Heathkit<br></div><div dir="ltr">> DX-60B transmitter. Yesterday, I was assembling the low-pass filter and<br></div><div dir="ltr">> found that two of the coil were missing. Figuring I could wind my own, I<br></div><div dir="ltr">> got some enameled wire and wound a bunch on a form that looked to be close<br></div><div dir="ltr">> to the right diameter. I measured the value with my AADE L/C meter and<br></div><div dir="ltr">> finding that it was too high, started to remove turns until I got to the<br></div><div dir="ltr">> correct value which was 0.32 uh in this case. Just for grins, I put the<br></div><div dir="ltr">> meter on one of the kit-supplied "green marked" coils that was, according<br></div><div dir="ltr">> to the manual, supposed to be 0.44uh. It measured 0.098uh. Since there are<br></div><div dir="ltr">> two of these, I measured the other one and it' value was 0.094uh. I<br></div><div dir="ltr">> also measured the other coils and they too were not even close to the<br></div><div dir="ltr">> manual values. Now this has me puzzled. Why would Heath put coils in<br></div><div dir="ltr">> the kit that are way out of spec. or, does it really matter for this<br></div><div dir="ltr">> application?<br></div><div dir="ltr">><br></div><div dir="ltr">> Doug<br></div><div dir="ltr">> VE7DRF<br></div><div dir="ltr">><br></div><div dir="ltr">-------------- next part --------------<br></div><div dir="ltr">An HTML attachment was scrubbed...<br></div><div dir="ltr">URL: <<a href="https://puck.nether.net/pipermail/heath/attachments/20180307/ead2b913/attachment-0001.html" target="_blank">https://puck.nether.net/pipermail/heath/attachments/20180307/ead2b913/attachment-0001.html</a>><br></div><div dir="ltr"><br></div><div dir="ltr">------------------------------<br></div><div dir="ltr"><br></div><div dir="ltr">Message: 5<br></div><div dir="ltr">Date: Wed, 7 Mar 2018 17:16:18 -0800<br></div><div dir="ltr">From: ChrisIwata <<a ymailto="mailto:chrisiwata@aol.com" href="mailto:chrisiwata@aol.com">chrisiwata@aol.com</a>><br></div><div dir="ltr">To: <a ymailto="mailto:heath@puck.nether.net" href="mailto:heath@puck.nether.net">heath@puck.nether.net</a><br></div><div dir="ltr">Subject: Re: [Heath] Inductor Values<br></div><div dir="ltr">Message-ID: <<a ymailto="mailto:5AA08EE2.8030907@aol.com" href="mailto:5AA08EE2.8030907@aol.com">5AA08EE2.8030907@aol.com</a>><br></div><div dir="ltr">Content-Type: text/plain; charset="windows-1252"; Format="flowed"<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">I also have an AADE L/C meter. Mostly it works fine, but some caveats:<br></div><div dir="ltr"><br></div><div dir="ltr">(1) Always run with a fresh 9V battery. When the battery is low, the <br></div><div dir="ltr">readings get screwy.<br></div><div dir="ltr">(2) Short leads are a must. Lay the component on the bottom side of the <br></div><div dir="ltr">case if you must: For whatever reason if you place the component over <br></div><div dir="ltr">the LCD part of the meter, the reading is changed. Bear in mind that the <br></div><div dir="ltr">leads become part of the component measurement.<br></div><div dir="ltr">(3) Always zero the meter before making measurements. For an inductor, <br></div><div dir="ltr">a short piece of bare wire directly between the binding posts is the <br></div><div dir="ltr">right method<br></div><div dir="ltr"><br></div><div dir="ltr">I've found this meter to be the most accurate when measuring small <br></div><div dir="ltr">values of L and C, bang-for-the buck wise.<br></div><div dir="ltr"><br></div><div dir="ltr">Chris, KL7DM<br></div><div dir="ltr"><br></div><div dir="ltr">On 3/7/2018 2:51 PM, Doug & Kathy Davies wrote:<br></div><div dir="ltr">> I ran the numbers through an on-line inductance calculator using the <br></div><div dir="ltr">> stock Heathkit coils. They all came out exactly what the manual <br></div><div dir="ltr">> values said they should be. I then wound a few turns of enameled wire <br></div><div dir="ltr">> on the form I have and, after playing with the turns, I achieved a <br></div><div dir="ltr">> value of 0.318 uH. The manual value is 0.320 uH so I think I'm good <br></div><div dir="ltr">> to go with those I wound. Looks like I won't be relying on the AADE <br></div><div dir="ltr">> L/C meter.<br></div><div dir="ltr">><br></div><div dir="ltr">> The coils are for the low pass filter in a Heathkit DX-60B <br></div><div dir="ltr">> transmitter. The schematic can be viewed here: <br></div><div dir="ltr">> <a href="https://www.vintage-radio.info/heathkit/" target="_blank">https://www.vintage-radio.info/heathkit/</a><br></div><div dir="ltr">><br></div><div dir="ltr">> Doug<br></div><div dir="ltr">> VE7DRF<br></div><div dir="ltr">><br></div><div dir="ltr">> On Wed, Mar 7, 2018 at 9:38 AM, Doug & Kathy Davies <br></div><div dir="ltr">> <<a ymailto="mailto:dkdavies3@gmail.com" href="mailto:dkdavies3@gmail.com">dkdavies3@gmail.com</a> <mailto:<a ymailto="mailto:dkdavies3@gmail.com" href="mailto:dkdavies3@gmail.com">dkdavies3@gmail.com</a>>> wrote:<br></div><div dir="ltr">><br></div><div dir="ltr">> I'm in the process of completing a previously partially built<br></div><div dir="ltr">> Heathkit DX-60B transmitter. Yesterday, I was assembling the<br></div><div dir="ltr">> low-pass filter and found that two of the coil were missing. <br></div><div dir="ltr">> Figuring I could wind my own, I got some enameled wire and wound a<br></div><div dir="ltr">> bunch on a form that looked to be close to the right diameter. I<br></div><div dir="ltr">> measured the value with my AADE L/C meter and finding that it was<br></div><div dir="ltr">> too high, started to remove turns until I got to the correct value<br></div><div dir="ltr">> which was 0.32 uh in this case. Just for grins, I put the meter<br></div><div dir="ltr">> on one of the kit-supplied "green marked" coils that was,<br></div><div dir="ltr">> according to the manual, supposed to be 0.44uh. It measured<br></div><div dir="ltr">> 0.098uh. Since there are two of these, I measured the other one<br></div><div dir="ltr">> and it' value was 0.094uh. I also measured the other coils and<br></div><div dir="ltr">> they too were not even close to the manual values.Now this has me<br></div><div dir="ltr">> puzzled. Why would Heath put coils in the kit that are way out of<br></div><div dir="ltr">> spec. or, does it really matter for this application?<br></div><div dir="ltr">><br></div><div dir="ltr">> Doug<br></div><div dir="ltr">> VE7DRF<br></div><div dir="ltr">><br></div><div dir="ltr">><br></div><div dir="ltr">><br></div><div dir="ltr">><br></div><div dir="ltr">> _______________________________________________<br></div><div dir="ltr">> Heath mailing list<br></div><div dir="ltr">> <a ymailto="mailto:Heath@puck.nether.net" href="mailto:Heath@puck.nether.net">Heath@puck.nether.net</a><br></div><div dir="ltr">> <a href="https://puck.nether.net/mailman/listinfo/heath" target="_blank">https://puck.nether.net/mailman/listinfo/heath</a><br></div><div dir="ltr"><br></div><div dir="ltr">-------------- next part --------------<br></div><div dir="ltr">An HTML attachment was scrubbed...<br></div><div dir="ltr">URL: <<a href="https://puck.nether.net/pipermail/heath/attachments/20180307/0cf72890/attachment.html" target="_blank">https://puck.nether.net/pipermail/heath/attachments/20180307/0cf72890/attachment.html</a>><br></div><div dir="ltr"><br></div><div dir="ltr">------------------------------<br></div><div dir="ltr"><br></div><div dir="ltr">Subject: Digest Footer<br></div><div dir="ltr"><br></div><div dir="ltr">_______________________________________________<br></div><div dir="ltr">Heath mailing list<br></div><div dir="ltr"><a ymailto="mailto:Heath@puck.nether.net" href="mailto:Heath@puck.nether.net">Heath@puck.nether.net</a><br></div><div dir="ltr"><a href="https://puck.nether.net/mailman/listinfo/heath" target="_blank">https://puck.nether.net/mailman/listinfo/heath</a><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">------------------------------<br></div><div dir="ltr"><br></div><div dir="ltr">End of Heath Digest, Vol 87, Issue 5<br></div><div dir="ltr">************************************<br></div><br><br></div> </div> </div> </div></div></body></html>