This list is for 160 meter issues --not for chemistry. There was only one response that was accurate -- from Dr. Schmidt. Brian started the discussion talking about isopropyl alcohol -- not ethyl alcohol and it turns out many don't recognize the difference. Hope you don't drink 99% IPA....but it would "clean up" this list if you did. 73, Greg-N4CC
-----Original Message----- From: [email protected] <[email protected]> On Behalf Of [email protected] Sent: Saturday, July 17, 2021 11:10 AM To: [email protected] Subject: Elecraft Digest, Vol 207, Issue 16 Send Elecraft mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit http://mailman.qth.net/mailman/listinfo/elecraft or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of Elecraft digest..." Today's Topics: 1. Re: Broke my K2 :( (John Marvin) 2. Re: Broke my K2 :( (jerry) 3. Re: Broke my K2 :( (Don Wilhelm) 4. Re: Broke my K2 :( ([email protected]) 5. 99.9 % alcohol (brianpepperdine brianpepperdine) 6. Re: 99.9 % alcohol (John Simmons) 7. Re: 99.9 % alcohol (John Marvin) 8. Re: 99.9 % alcohol (Ed Pflueger) 9. Re: 99.9 % alcohol (Dr. William J. Schmidt) 10. Fw: 99.9 % alcohol (James Driskell) 11. Re: 99.9 % alcohol (MIKE ZANE) 12. Re: Broke my K2 :( (Alan Bloom) 13. Re: K2 Only 30-metre Band Works (VA1CQ) 14. Re: Broke my K2 :( (Louandzip) 15. Re: Broke my K2 :( (Clay Autery) 16. Nabble down (Barry) 17. Flaky mic jack on KX3 (Walter Underwood) 18. Re: Flaky mic jack on KX3 (Lyn Norstad) 19. FS: KX3 with all the internal options and accesories (AL7CR) 20. Background RF noise from a KPA1500 amp (Louis Fiore) 21. W2 Sensors - calibration (Michael Walker) 22. WTB: KPA100/KAT100/EC2 (Ed G) ---------------------------------------------------------------------- Message: 1 Date: Wed, 14 Jul 2021 17:06:18 -0600 From: John Marvin <[email protected]> To: [email protected] Subject: Re: [Elecraft] Broke my K2 :( Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8; format=flowed Hopefully this is obvious, but make sure you are using the 90-91% isopropyl alcohol, and not the 70% variety. It can still be hard to get the 90% variety these days. 73, John? - AC0ZG On 7/14/2021 4:41 PM, Peter Eijlander (PA0PJE) wrote: > Yes Jerry, isopropyl alcohol does this! > I once cleaned a working print of a GPS receiver with isopropyl > alcohol and it stopped working. Letting it be and trying it again next > day turned out it worked perfectly again. > > ?From then on I leave a PCB to rest after cleaning to have the IPA dry > out completely... > > 73, > Peter - PA0PJE > > > > > > Op 14-07-2021 om 14:54 schreef jerry: >> Actually, I suspect that when I scrubbed it with isopropyl alcohol, >> it shorted out > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > [email protected] ------------------------------ Message: 2 Date: Wed, 14 Jul 2021 16:20:01 -0700 From: jerry <[email protected]> To: John Marvin <[email protected]> Cc: [email protected] Subject: Re: [Elecraft] Broke my K2 :( Message-ID: <[email protected]> Content-Type: text/plain; charset=UTF-8; format=flowed Yup, it's the 90% stuff. It was impossible to get a year ago, but not too bad now. Still, I had to wait a month or so when I ordered it from Amazon. - Jerry KF6VB On 2021-07-14 16:06, John Marvin wrote: > Hopefully this is obvious, but make sure you are using the 90-91% > isopropyl alcohol, and not the 70% variety. It can still be hard to > get the 90% variety these days. > > 73, > John? - AC0ZG > > On 7/14/2021 4:41 PM, Peter Eijlander (PA0PJE) wrote: >> Yes Jerry, isopropyl alcohol does this! >> I once cleaned a working print of a GPS receiver with isopropyl >> alcohol and it stopped working. Letting it be and trying it again >> next day turned out it worked perfectly again. >> >> ?From then on I leave a PCB to rest after cleaning to have the IPA >> dry out completely... >> >> 73, >> Peter - PA0PJE >> >> >> >> >> >> Op 14-07-2021 om 14:54 schreef jerry: >>> Actually, I suspect that when I scrubbed it with isopropyl alcohol, >>> it shorted out >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net Please help support this >> email list: http://www.qsl.net/donate.html Message delivered to >> [email protected] > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > [email protected] ------------------------------ Message: 3 Date: Wed, 14 Jul 2021 19:20:58 -0400 From: Don Wilhelm <[email protected]> To: [email protected] Subject: Re: [Elecraft] Broke my K2 :( Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8; format=flowed When I have cleaned boards with IPA or other cleaners, I apply the IPA only in a small spot with a q-tip and then blot it with a paper towel to help dry it - do not flood the board. I generally do not recommend cleaning boards, solder flux is non-conductive and will normally not cause a problem. I only clean when the solder flux residue is really nasty as might occur with Kester 44 solder. Use of a solder with a mildly reactive flux (Kester 385) will reduce the need for cleaning the board - there is almost no residue. If you do choose to clean the board, make sure your cleaning work is complete.? While solder flux is non-conductive, the flux plus the cleaner may be conductive leading to resistive leakage paths. If you can see any white stuff on the board, you have not done a complete job. 73, Don W3FPR On 7/14/2021 6:41 PM, Peter Eijlander (PA0PJE) wrote: > Yes Jerry, isopropyl alcohol does this! > I once cleaned a working print of a GPS receiver with isopropyl > alcohol and it stopped working. Letting it be and trying it again next > day turned out it worked perfectly again. > > ?From then on I leave a PCB to rest after cleaning to have the IPA dry > out completely... > ------------------------------ Message: 4 Date: Wed, 14 Jul 2021 16:37:52 -0700 From: [email protected] To: [email protected] Subject: Re: [Elecraft] Broke my K2 :( Message-ID: <[email protected]> Content-Type: text/plain; charset=us-ascii 99% Isopropyl is available from Uline. Aerospace industry standard is Miller-Stephenson Contact Re-Nu MS-530. Evaporates quickly and leaves no residue. Great stuff but pricey and you'll have to work to find it. GL - Steve WB6RSE > > Yup, it's the 90% stuff. It was impossible to get a year ago, but not > too bad now. Still, I had to wait a month or so when I ordered it > from Amazon. > > - Jerry KF6VB > > > > On 2021-07-14 16:06, John Marvin wrote: >> Hopefully this is obvious, but make sure you are using the 90-91% >> isopropyl alcohol, and not the 70% variety. It can still be hard to >> get the 90% variety these days. >> 73, >> John - AC0ZG >> On 7/14/2021 4:41 PM, Peter Eijlander (PA0PJE) wrote: >>> Yes Jerry, isopropyl alcohol does this! >>> I once cleaned a working print of a GPS receiver with isopropyl alcohol and it stopped working. Letting it be and trying it again next day turned out it worked perfectly again. >>> From then on I leave a PCB to rest after cleaning to have the IPA dry out completely... >>> 73, >>> Peter - PA0PJE ------------------------------ Message: 5 Date: Wed, 14 Jul 2021 19:41:17 -0400 (EDT) From: brianpepperdine brianpepperdine <[email protected]> To: Elecraft <[email protected]> Subject: [Elecraft] 99.9 % alcohol Message-ID: <988950577.220969.1626306077457.JavaMail.open-xchange@torgui04> Content-Type: text/plain; charset=UTF-8 I have no idea, obviously, what the USA market offers, but here we get 99.9% (not 90%) isoprophyl alcohol. So much the better re. less residue of course. Admittedly it was a bit hard to get at the beginning of the pandemic but that seemed resolved with a couple months. Ages past I had to ask the pharmacist for it and he decanted it from a large bottle behind the counter into a small bottle for me. He said you are either diabetic or into electronics, as I think that was the main call for it. Largely they sold the smaller percentage stuff for rubbing and sores. Here is is stocked on the shelf now already packaged, in the first aid area (right next to the alcohol swabs). If hard to find you might ask your pharmacist.. its possible they have it behind the counter for the real need purposes, or he can suggest if he can order-in. You never know. I doubt at this time now that there is any real supply shortage, IMHO" Brian VE3HI Toronto ------------------------------ Message: 6 Date: Wed, 14 Jul 2021 18:51:18 -0500 From: John Simmons <[email protected]> To: Elecraft <[email protected]> Subject: Re: [Elecraft] 99.9 % alcohol Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8; format=flowed Here in the USA it is called 'denatured alchohol'. Cheapest to buy in the paint department of the big-box stores. Or, at the liquor store as "Everclear" hi hi -de John NI0K brianpepperdine brianpepperdine wrote on 7/14/2021 6:41 PM: > I have no idea, obviously, what the USA market offers, but here we get > 99.9% (not 90%) isoprophyl alcohol. So much the better re. less residue of course. > Admittedly it was a bit hard to get at the beginning of the pandemic > but that seemed resolved with a couple months. > > Ages past I had to ask the pharmacist for it and he decanted it from a > large bottle behind the counter into a small bottle for me. > He said you are either diabetic or into electronics, as I think that > was the main call for it. Largely they sold the smaller percentage > stuff for rubbing and sores. > Here is is stocked on the shelf now already packaged, in the first aid > area (right next to the alcohol swabs). > > If hard to find you might ask your pharmacist.. its possible they have > it behind the counter for the real need purposes, or he can suggest if he can order-in. > You never know. I doubt at this time now that there is any real supply > shortage, IMHO" > > Brian VE3HI Toronto > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > [email protected] ------------------------------ Message: 7 Date: Wed, 14 Jul 2021 17:59:31 -0600 From: John Marvin <[email protected]> To: [email protected] Subject: Re: [Elecraft] 99.9 % alcohol Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8; format=flowed Anything above 95% or so requires processes beyond just distillation, i.e. you are getting into the lab grade region. Prices usually go up significantly for that. Of course, in many states you can buy 190 proof Everclear (95% grain alcohol) at a liquor store.? Might be easier to find than lab grade alcohol.? One advantage is that since it is not denatured, the fumes are significantly less toxic. Since alcohol is hydrophilic, it helps to evaporate the water that makes up the rest of the alcohol mixture. I suspect that getting much above 90% doesn't yield significant improvement in evaporation time. But we obviously have examples here where using something higher than 90% would be more desirable if you are not spot cleaning and don't want to wait. Regards, John AC0ZG On 7/14/2021 5:41 PM, brianpepperdine brianpepperdine wrote: > I have no idea, obviously, what the USA market offers, but here we get > 99.9% (not 90%) isoprophyl alcohol. So much the better re. less residue of course. > Admittedly it was a bit hard to get at the beginning of the pandemic > but that seemed resolved with a couple months. > > Ages past I had to ask the pharmacist for it and he decanted it from a > large bottle behind the counter into a small bottle for me. > He said you are either diabetic or into electronics, as I think that > was the main call for it. Largely they sold the smaller percentage > stuff for rubbing and sores. > Here is is stocked on the shelf now already packaged, in the first aid > area (right next to the alcohol swabs). > > If hard to find you might ask your pharmacist.. its possible they have > it behind the counter for the real need purposes, or he can suggest if he can order-in. > You never know. I doubt at this time now that there is any real supply > shortage, IMHO" > > Brian VE3HI Toronto > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > [email protected] ------------------------------ Message: 8 Date: Wed, 14 Jul 2021 19:04:59 -0500 From: "Ed Pflueger" <[email protected]> To: "'John Simmons'" <[email protected]>, "'Elecraft'" <[email protected]> Subject: Re: [Elecraft] 99.9 % alcohol Message-ID: <[email protected]> Content-Type: text/plain; charset="us-ascii" I'm in Kentucky we call it White Lightening. In the Navy we used 190 proof to clean the salinity cells. Ed.. AB4IQ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of John Simmons Sent: Wednesday, July 14, 2021 6:51 PM To: Elecraft <[email protected]> Subject: Re: [Elecraft] 99.9 % alcohol Here in the USA it is called 'denatured alchohol'. Cheapest to buy in the paint department of the big-box stores. Or, at the liquor store as "Everclear" hi hi -de John NI0K brianpepperdine brianpepperdine wrote on 7/14/2021 6:41 PM: > I have no idea, obviously, what the USA market offers, but here we get > 99.9% (not 90%) isoprophyl alcohol. So much the better re. less > residue of course. > Admittedly it was a bit hard to get at the beginning of the pandemic > but that seemed resolved with a couple months. > > Ages past I had to ask the pharmacist for it and he decanted it from a > large bottle behind the counter into a small bottle for me. > He said you are either diabetic or into electronics, as I think that > was the main call for it. Largely they sold the smaller percentage > stuff for rubbing and sores. > Here is is stocked on the shelf now already packaged, in the first aid > area (right next to the alcohol swabs). > > If hard to find you might ask your pharmacist.. its possible they have > it behind the counter for the real need purposes, or he can suggest if > he can order-in. > You never know. I doubt at this time now that there is any real supply > shortage, IMHO" > > Brian VE3HI Toronto > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ------------------------------ Message: 9 Date: Wed, 14 Jul 2021 19:08:17 -0500 From: "Dr. William J. Schmidt" <[email protected]> To: <[email protected]> Subject: Re: [Elecraft] 99.9 % alcohol Message-ID: <[email protected]> Content-Type: text/plain; charset="UTF-8" Isopropanol is never denatured because its not consumable by humans. Only materials that are consumable are denatured, and that is usually done by adding natural gasoline (pentanes) to make it poison, and this is usually used in the fuel industry for blending with gasoline. Ethanol (drinkable) is, indeed a maximum of 90% pure due to the azeotrope that is formed with ethanol and water that causes a pinch point and lack of ability to distill it into a more pure form. Distilling above 90% can be done by adding a third substance to get around the Azeotropic pinch point, or by use of sieves to absorb water. Dr. William J. Schmidt (one of my Ph.D. is in Chemical Engineering) -----Original Message----- From: [email protected] <[email protected]> On Behalf Of John Marvin Sent: Wednesday, July 14, 2021 7:00 PM To: [email protected] Subject: Re: [Elecraft] 99.9 % alcohol Anything above 95% or so requires processes beyond just distillation, i.e. you are getting into the lab grade region. Prices usually go up significantly for that. Of course, in many states you can buy 190 proof Everclear (95% grain alcohol) at a liquor store. Might be easier to find than lab grade alcohol. One advantage is that since it is not denatured, the fumes are significantly less toxic. Since alcohol is hydrophilic, it helps to evaporate the water that makes up the rest of the alcohol mixture. I suspect that getting much above 90% doesn't yield significant improvement in evaporation time. But we obviously have examples here where using something higher than 90% would be more desirable if you are not spot cleaning and don't want to wait. Regards, John AC0ZG On 7/14/2021 5:41 PM, brianpepperdine brianpepperdine wrote: > I have no idea, obviously, what the USA market offers, but here we get > 99.9% (not 90%) isoprophyl alcohol. So much the better re. less residue of course. > Admittedly it was a bit hard to get at the beginning of the pandemic > but that seemed resolved with a couple months. > > Ages past I had to ask the pharmacist for it and he decanted it from a > large bottle behind the counter into a small bottle for me. > He said you are either diabetic or into electronics, as I think that > was the main call for it. Largely they sold the smaller percentage > stuff for rubbing and sores. > Here is is stocked on the shelf now already packaged, in the first aid > area (right next to the alcohol swabs). > > If hard to find you might ask your pharmacist.. its possible they have > it behind the counter for the real need purposes, or he can suggest if he can order-in. > You never know. I doubt at this time now that there is any real supply > shortage, IMHO" > > Brian VE3HI Toronto > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] -- This email has been checked for viruses by AVG. https://www.avg.com ------------------------------ Message: 10 Date: Thu, 15 Jul 2021 00:14:20 +0000 From: James Driskell <[email protected]> To: Elecraft Reflector <[email protected]> Subject: [Elecraft] Fw: 99.9 % alcohol Message-ID: <mw2pr1501mb207435f3d3828bb26d83cbaac0...@mw2pr1501mb2074.namprd15.prod.outl ook.com> Content-Type: text/plain; charset="iso-8859-1" ________________________________ From: James Driskell <[email protected]> Sent: Wednesday, July 14, 2021 17:11 To: John Simmons <[email protected]> Subject: Re: [Elecraft] 99.9 % alcohol Not quite. Denatured alcohol is ethyl alcohol that contains methyl alcohol or isopropyl alcohol which make the mixture unfit for drinking. Pure ethyl alcohol is drinkable (it's the kick in your booze), but probably contains at least 5% water because of its nature to absorb water. Absolute ethyl or isopropyl alcohol is at least 99% pure. Unless securely sealed, the alcohols will absorb water winding up at about 95+% alcohol. 99% isopropyl alcohol is available from https://artnaturals.com/ [https://artnaturals.com/media/default/default/MainBanner_Mobile.jpg]<https: //artnaturals.com/> Essential Oils | Diffusers | Skin & Bath & Body | Hair Care<https://artnaturals.com/> Try artnaturals? 100% Pure Essential Oils, Argan Oil hair care, skin care, bath and body beauty products. Over 4 Million sold, made with only natural and organic ingredients. artnaturals.com Everclear (sometimes called Georgia Moon) may run as high as 95% (190 proof), but you need to be careful with that stuff because it will stomp you and you don't dare smoke for 48 hours. 73, Jim Driskell W7OWI ________________________________ From: [email protected] <[email protected]> on behalf of John Simmons <[email protected]> Sent: Wednesday, July 14, 2021 16:51 To: Elecraft <[email protected]> Subject: Re: [Elecraft] 99.9 % alcohol Here in the USA it is called 'denatured alchohol'. Cheapest to buy in the paint department of the big-box stores. Or, at the liquor store as "Everclear" hi hi -de John NI0K brianpepperdine brianpepperdine wrote on 7/14/2021 6:41 PM: > I have no idea, obviously, what the USA market offers, but here we get 99.9% > (not 90%) isoprophyl alcohol. So much the better re. less residue of course. > Admittedly it was a bit hard to get at the beginning of the pandemic but that > seemed resolved with a couple months. > > Ages past I had to ask the pharmacist for it and he decanted it from a large > bottle behind the counter into a small bottle for me. > He said you are either diabetic or into electronics, as I think that was the > main call for it. Largely they sold the smaller percentage stuff for rubbing and > sores. > Here is is stocked on the shelf now already packaged, in the first aid area > (right next to the alcohol swabs). > > If hard to find you might ask your pharmacist.. its possible they have it behind > the counter for the real need purposes, or he can suggest if he can order-in. > You never know. I doubt at this time now that there is any real supply shortage, > IMHO" > > Brian VE3HI Toronto > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ------------------------------ Message: 11 Date: Wed, 14 Jul 2021 17:41:53 -0700 (PDT) From: MIKE ZANE <[email protected]> To: Ed Pflueger <[email protected]>, John Simmons <[email protected]>, Elecraft <[email protected]> Subject: Re: [Elecraft] 99.9 % alcohol Message-ID: <[email protected]> Content-Type: text/plain; charset=UTF-8 AKA "Torpedo Juice"? > On 07/14/2021 5:04 PM Ed Pflueger <[email protected]> wrote: > > > I'm in Kentucky we call it White Lightening. In the Navy we used 190 proof > to clean the salinity cells. > > Ed.. AB4IQ > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of John Simmons > Sent: Wednesday, July 14, 2021 6:51 PM > To: Elecraft <[email protected]> > Subject: Re: [Elecraft] 99.9 % alcohol > > Here in the USA it is called 'denatured alchohol'. Cheapest to buy in the > paint department of the big-box stores. Or, at the liquor store as > "Everclear" hi hi > > -de John NI0K > > brianpepperdine brianpepperdine wrote on 7/14/2021 6:41 PM: > > I have no idea, obviously, what the USA market offers, but here we get > > 99.9% (not 90%) isoprophyl alcohol. So much the better re. less residue of > course. > > Admittedly it was a bit hard to get at the beginning of the pandemic > > but that seemed resolved with a couple months. > > > > Ages past I had to ask the pharmacist for it and he decanted it from a > > large bottle behind the counter into a small bottle for me. > > He said you are either diabetic or into electronics, as I think that > > was the main call for it. Largely they sold the smaller percentage > > stuff for rubbing and sores. > > Here is is stocked on the shelf now already packaged, in the first aid > > area (right next to the alcohol swabs). > > > > If hard to find you might ask your pharmacist.. its possible they have > > it behind the counter for the real need purposes, or he can suggest if he > can order-in. > > You never know. I doubt at this time now that there is any real supply > > shortage, IMHO" > > > > Brian VE3HI Toronto > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[email protected] > > > > This list hosted by: http://www.qsl.net Please help support this email > > list: http://www.qsl.net/donate.html Message delivered to > > [email protected] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html Message > delivered to [email protected] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ------------------------------ Message: 12 Date: Thu, 15 Jul 2021 04:06:02 -0600 From: Alan Bloom <[email protected]> To: [email protected] Subject: Re: [Elecraft] Broke my K2 :( Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8; format=flowed Don is exactly right about this.? When I was at HP/Agilent, the company directive was generally not to try to clean the rosin with alcohol.? (Rosin-core solder was used only in rework.)? The rosin contains an acid to help with the soldering, but the acid is locked up inside the rosin where it does no harm.? Once you dissolve the rosin with the alcohol it spreads out and can cause leakage paths between connections.? Just leave the rosin there; it does no harm HP did clean production boards after going through the wave solder machine.? But that used a water-soluble flux and the cleaning process was thorough enough to completely remove all traces of flux.? That's basically not possible using alcohol and cotton swabs on rosin. Alan N1AL On 7/14/2021 5:20 PM, Don Wilhelm wrote: > When I have cleaned boards with IPA or other cleaners, I apply the IPA > only in a small spot with a q-tip and then blot it with a paper towel > to help dry it - do not flood the board. > I generally do not recommend cleaning boards, solder flux is > non-conductive and will normally not cause a problem. > I only clean when the solder flux residue is really nasty as might > occur with Kester 44 solder. > Use of a solder with a mildly reactive flux (Kester 385) will reduce > the need for cleaning the board - there is almost no residue. > > If you do choose to clean the board, make sure your cleaning work is > complete.? While solder flux is non-conductive, the flux plus the > cleaner may be conductive leading to resistive leakage paths. If you > can see any white stuff on the board, you have not done a complete job. > > 73, > Don W3FPR > > On 7/14/2021 6:41 PM, Peter Eijlander (PA0PJE) wrote: >> Yes Jerry, isopropyl alcohol does this! >> I once cleaned a working print of a GPS receiver with isopropyl >> alcohol and it stopped working. Letting it be and trying it again >> next day turned out it worked perfectly again. >> >> ?From then on I leave a PCB to rest after cleaning to have the IPA >> dry out completely... ------------------------------ Message: 13 Date: Thu, 15 Jul 2021 08:15:58 -0300 From: VA1CQ <[email protected]> To: [email protected] Subject: Re: [Elecraft] K2 Only 30-metre Band Works Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8; format=flowed Don, I borrowed a couple of new relays from my KAT2 kit. I installed K1 and K2 with the correct orientation this time. This immediately resolved all transmit and receive problems. I have pushed on to successfully build the KNB2, KBT2 and I'm now working on the KSB2. No further problems have been found. The K160RX, KAT2 and KIO2 will follow these. My replacement relays are on the way to me from Elecraft. I'm having fun again. I have downloaded Spectrogram and I'll use it for filter alignment as soon as I complete the KSB2 just to be thorough but I'm already happy with the way the K2 is working. I've also bookmarked your web page since I see lots of useful articles. This email list sure is a useful resource. 73, Murray VA1CQ -- This email has been checked for viruses by AVG. https://www.avg.com ------------------------------ Message: 14 Date: Thu, 15 Jul 2021 11:49:34 +0000 (UTC) From: Louandzip <[email protected]> To: "[email protected]" <[email protected]> Subject: Re: [Elecraft] Broke my K2 :( Message-ID: <[email protected]> Content-Type: text/plain; charset=UTF-8 Yep.?? I worked at an company where we had some boards with very high impedance circuitry (with the usual guard rings etc.).? We tried many things trying to get wave soldering and aqueous flux to work, but no amount of rinsing washing got the surface conductivity down to where we needed it . We wound up using mildly active rosin based flux on those boards. The diluent in 70 and 91% isopropanol is water.? 99.9% isopropanol will only be 99.9% when you first open the bottle.? It starts aggressively absorbing water from the atmosphere as soon as exposed.? Lou W7HV On Thursday, July 15, 2021, 4:06:54 AM MDT, Alan Bloom <[email protected]> wrote: Don is exactly right about this.? When I was at HP/Agilent, the company directive was generally not to try to clean the rosin with alcohol.? (Rosin-core solder was used only in rework.)? The rosin contains an acid to help with the soldering, but the acid is locked up inside the rosin where it does no harm.? Once you dissolve the rosin with the alcohol it spreads out and can cause leakage paths between connections.? Just leave the rosin there; it does no harm HP did clean production boards after going through the wave solder machine.? But that used a water-soluble flux and the cleaning process was thorough enough to completely remove all traces of flux.? That's basically not possible using alcohol and cotton swabs on rosin. Alan N1AL On 7/14/2021 5:20 PM, Don Wilhelm wrote: > When I have cleaned boards with IPA or other cleaners, I apply the IPA > only in a small spot with a q-tip and then blot it with a paper towel > to help dry it - do not flood the board. > I generally do not recommend cleaning boards, solder flux is > non-conductive and will normally not cause a problem. > I only clean when the solder flux residue is really nasty as might > occur with Kester 44 solder. > Use of a solder with a mildly reactive flux (Kester 385) will reduce > the need for cleaning the board - there is almost no residue. > > If you do choose to clean the board, make sure your cleaning work is > complete.? While solder flux is non-conductive, the flux plus the > cleaner may be conductive leading to resistive leakage paths. If you > can see any white stuff on the board, you have not done a complete job. > > 73, > Don W3FPR > > On 7/14/2021 6:41 PM, Peter Eijlander (PA0PJE) wrote: >> Yes Jerry, isopropyl alcohol does this! >> I once cleaned a working print of a GPS receiver with isopropyl >> alcohol and it stopped working. Letting it be and trying it again >> next day turned out it worked perfectly again. >> >> ?From then on I leave a PCB to rest after cleaning to have the IPA >> dry out completely... ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ------------------------------ Message: 15 Date: Thu, 15 Jul 2021 07:40:27 -0500 From: Clay Autery <[email protected]> To: Louandzip via Elecraft <[email protected]> Subject: Re: [Elecraft] Broke my K2 :( Message-ID: <93b917e9-8a93-4155-a482-8e9732f4deb6@edison> Content-Type: text/plain; charset="utf-8" You can radically mitigate the issue by using a secondary container for that which you'll use in a week or so, and only open the quart/gallon to dispense to working container. I have dry argon in my shack to purge gas space in any container that is hygroscopic or oxidizes in presence of atmosphere. I use 99.9 for cleaning all boards (flush after "scrub"). Where allowed, I follow up with RODI water flush and forced air drying. Clay Autery KY5G > > On Jul 15, 2021 at 06:51, Louandzip via Elecraft <[email protected]> wrote: > > > 99.9% isopropanol will only be 99.9% when you first open the bottle. It starts aggressively absorbing water from the atmosphere as soon as exposed. > > Lou W7HV ------------------------------ Message: 16 Date: Thu, 15 Jul 2021 07:30:21 -0600 From: Barry <[email protected]> To: [email protected] Subject: [Elecraft] Nabble down Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8; format=flowed Nabble has been unavailable (DNS error) to read the kist for a few days.? Temporary glitch or is it gone forever? Barry W2UP ------------------------------ Message: 17 Date: Thu, 15 Jul 2021 10:50:42 -0700 From: Walter Underwood <[email protected]> To: Reflector Elecraft <[email protected]> Subject: [Elecraft] Flaky mic jack on KX3 Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8 The mic jack on my KX3 is not making good contact with my MH3. I need to push the plug in an extra bit, then feel a small click, then PTT works. If I move the cable at all, it backs out past that click and the PTT switch doesn?t make the rig transmit. The same thing happens with other plugs. This is a fairly early model, serial number 29xx. Any ideas other than sending it in for repair? wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) ------------------------------ Message: 18 Date: Thu, 15 Jul 2021 18:52:22 -0000 From: "Lyn Norstad" <[email protected]> To: "'Walter Underwood'" <[email protected]>, "'Reflector Elecraft'" <[email protected]> Subject: Re: [Elecraft] Flaky mic jack on KX3 Message-ID: <[email protected]> Content-Type: text/plain; charset="UTF-8" You could try to replace the jack yourself. It's an uncommon size (TRRS), but Philmore #70-088 should work: https://shopintertex.com/philmore-70-088-chassis-mt-female-jack-3-5mm-4-cond uctor.html?gclid=Cj0KCQjwub-HBhCyARIsAPctr7y3_kdB6IO7H2ehsuk2J5Ogwgfu2jpcBB2 wN-453t_tS2F43g2z7JoaAlkZEALw_wcB 73 Lyn, W0LEN -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Walter Underwood Sent: Thursday, July 15, 2021 5:51 PM To: Reflector Elecraft Subject: [Elecraft] Flaky mic jack on KX3 The mic jack on my KX3 is not making good contact with my MH3. I need to push the plug in an extra bit, then feel a small click, then PTT works. If I move the cable at all, it backs out past that click and the PTT switch doesn?t make the rig transmit. The same thing happens with other plugs. This is a fairly early model, serial number 29xx. Any ideas other than sending it in for repair? wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ------------------------------ Message: 19 Date: Thu, 15 Jul 2021 13:28:09 -0700 From: AL7CR <[email protected]> To: Elecraft <[email protected]> Subject: [Elecraft] FS: KX3 with all the internal options and accesories Message-ID: <[email protected]> Content-Type: text/plain I am offering my KX3 for sale. It is in very nice condition and functions as new. All the available internal options are installed. It will ship with the full original cable set, the printed manuals, and the accessories listed below. The installed options are: KXAT3 20 watt ATU KX3-2M 2 meter module KXBC3 NiMh Internal Charger with Real Time Clock KCFL3 Dual Bandwidth Roofing Filter The accessories included are: KC3-PCKT Cable Set MH-3 Hand Mike XG50 Signal Source The entire package is $1400 shipped in the US. Payment via Paypal. ------------------------------ Message: 20 Date: Sat, 17 Jul 2021 11:44:40 -0400 From: Louis Fiore <[email protected]> To: [email protected] Subject: [Elecraft] Background RF noise from a KPA1500 amp Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8 Good morning, Has anyone noticed a slight background noise increase from both the KPA1500 amp and its power supply? It seems the background noise on the waterfall of my Flex radio goes down about 2 db when I turn off the amp and another db or so when I turn off the power supply. It?s about a 3 db overall increase when both are on. I?ve noticed this on 80 meters and to a lesser extent on 40 meters. It is imperceptible on 20 meters. There?s too much local noise to see anything on 160 meters. 73, Lou W2LTF ------------------------------ Message: 21 Date: Sat, 17 Jul 2021 12:06:06 -0400 From: Michael Walker <[email protected]> To: "[email protected]" <[email protected]> Subject: [Elecraft] W2 Sensors - calibration Message-ID: <ca+33ts5ho8avaulzlzbufusjxt21ep-+ets3ykqvcygzndg...@mail.gmail.com> Content-Type: text/plain; charset="UTF-8" Hi All At the moment, I am using a 200 watt HF W2 Sensor on VHF, and while I realize it isn't far from perfect, it is perfectly good enough to tell me if I have LOTS of watts out on a remote VHF station or no watts out. I could calibrate it against a known good watt meter if need as that is easy enough to do. Or, could I convert it to a VHF 200 watt sensor as it looks like Elecraft is not stocking them anymore based on trying to order a couple from the web page. The W2 is a great meter for remote operation and we actually use NodeRed on a RPI to make it web readable. Mike va3mw ------------------------------ Message: 22 Date: Sat, 17 Jul 2021 13:08:44 -0400 From: Ed G <[email protected]> To: "[email protected]" <[email protected]> Subject: [Elecraft] WTB: KPA100/KAT100/EC2 Message-ID: <[email protected]> Content-Type: text/plain; charset="utf-8" Looking to buy a KPA100 amp and KAT100 tuner in the EC2 enclosure. Thanks for info? --Ed, N3CW? -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ------------------------------ _______________________________________________ Elecraft mailing list Post to: [email protected] http://mailman.qth.net/mailman/listinfo/elecraft You must be a subscriber to post. Elecraft web page: http://www.elecraft.com End of Elecraft Digest, Vol 207, Issue 16 ***************************************** ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
