Re: [Elecraft] KSYN3A mod problem

Ethanol and Isopropyl Alcohol are almost as polar as water. That's why they mix so well with water. https://en.wikipedia.org/wiki/Solvent According to its Wikipedia entry, ethanol doesn't even mix well with heavy oils. Isopropanol is better. -- David Woolley Owner K2 06123 On 09/09/15

Re: [Elecraft] KSYN3A mod problem

>Don: >Acetone should NEVER be used in electronic assembles. Acetone >causes both long and short term effects on various components >including the PCB. It effects epoxy, lacquers, paints, and plastics, >particularly polystyrenes [...] >73, Fred, AE6QL Chemicals intended for use around

Re: [Elecraft] KSYN3A mod problem

PCBs (FR-4) are glass reinforced epoxy, not polyester (I think the old, brown ones (SRBP) are paper reinforced urea-formaldehyde). Also the resin component is cross-linked, whereas the article is talking about thinning the uncured (un-crosslinked) resin. (Glass reinforced polyester is used in

Re: [Elecraft] KSYN3A mod problem

and evaporates more cleanly. Jer -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ian White Sent: Tuesday, September 08, 2015 4:09 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KSYN3A mod problem >Don: >Acetone should NEVER b

Re: [Elecraft] KSYN3A mod problem

> Food grade EverClear is 100% alcohol... Not quite. Pure ethanol is a *practical* impossibility. https://en.m.wikipedia.org/wiki/Everclear_(alcohol) It comes in 75.5 percent (151 proof) and 95 percent ethanol (190 proof) varieties. Sale of the 95 percent is banned in some states. The 91

Re: [Elecraft] KSYN3A mod problem

One other thing to consider that can make a difference in some cases. There are three types of alcohol commonly available. Methanol often used as shellac thinner, ethanol, booze if you wish, which EverClear is, and isopropyl which is often found in rubbing alcohol sold in drugstores. They

Re: [Elecraft] KSYN3A mod problem

You can get denatured alcohol from the hardware store, but I think that can contain methanol which I wouldn't suggest using because of toxicity and because it melts more things than ethanol. Methanol will go through your skin so you need ventilation and the correct gloves. Rubbing alcohol from

Re: [Elecraft] KSYN3A mod problem

for cleaning and evaporates more cleanly. Jer -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ian White Sent: Tuesday, September 08, 2015 4:09 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KSYN3A mod problem >Don: >Acetone should NEVER b

Re: [Elecraft] KSYN3A mod problem

Food grade EverClear is 100% alcohol but government classified in the U.S. as a taxable beverage. Buy it at a liquor store. -- Marc W8SDG > On Sep 8, 2015, at 9:14 AM, > wrote: > > When you purchase alcohol to use as cleanup it's best to

Re: [Elecraft] KSYN3A mod problem

6QL -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Monday, September 7, 2015 2:43 PM To: Nick Lelyak Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] KSYN3A mod problem Nick, Yes, but it fails when it cools again - someth

Re: [Elecraft] KSYN3A mod problem

Disband the terrorist EPA (A terrific idea regardless) and we could go back to Freon vapor degreasers. On 9/7/2015 5:05 PM, Don Wilhelm wrote: Fred, Gary and I both have been using acetone for a long time. If the board is flooded, the results can be catastrophic since residue flows under

Re: [Elecraft] KSYN3A mod problem

ong as it pure, be used for de-fluxing PC boards. 73, Fred, AE6QL -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Monday, September 7, 2015 2:43 PM To: Nick Lelyak Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] KSYN3A mod prob

Re: [Elecraft] KSYN3A mod problem

Nick, Yes, but it fails when it cools again - something is not making good contact, and it may be residue from the cleaner. I can't be certain of that, but I would get that cleaner residue off and try again. I would suggest that you remove the cleaner residue from the contacts with acetone

Re: [Elecraft] KSYN3A mod problem

yes Don, problem comes on again after radio cools down. Pins were properly cleaned from residue, but they are not gold plated and I black spots on some of them had left after cleaning with contact cleaner. So I decided buy recommended cleaner first Thanks Nick On Mon, Sep 7, 2015 at 5:43 PM,

Re: [Elecraft] KSYN3A mod problem

Thanks Don, Guy appreciate yours quick response. I found out that problem disappears when front panel warms up to 37 C and more. Looks like problem somewhere in FP. To clean main connector I used Electronic Contact Cleaner. It may works not so good as Deoxit which is not widely available in

Re: [Elecraft] KSYN3A mod problem

Nick, I don't think it is related to the synthesizer, but go through the other things you did (cleaning the Front Panel connector and some other boards) - you should unplug those, and depending on how you "cleaned" the connectors, wipe them carefully and reassemble. Work on each connector

[Elecraft] KSYN3A mod problem

Hi, have replaced old synthesizer in my K3 for new KSYN3A and have problem with this modification. Changing frequency by VFO A or VFO B several kHz up or down switches mode to reverse (CW to CWR, USB to LSB), frequency on display jumps 1 mHz lower ( ex. 14015.00 > 13015.00, 1830.00 > 0830.00 etc.)