Search found 587 matches

by Joseph
Sun Aug 12, 2018 9:19 am
Forum: General Discussion
Topic: Beheaded fatty nail as soldering tip...
Replies: 21
Views: 998

Re: Beheaded fatty nail as soldering tip...

Hi Mr Al, sorry if I missed replying to something. If you like to send it again I can still try to answer it. I remember now about the diamond things. The little hand files came from Dollar Tree, four in the pack. I also got packs of diamond cutting wheels for my Dremel rotary tool from Harbor Freig...
by Joseph
Sat Aug 11, 2018 12:44 pm
Forum: General Discussion
Topic: Beheaded fatty nail as soldering tip...
Replies: 21
Views: 998

Re: Beheaded fatty nail as soldering tivp...

Howdy Mr Al, thanks for mentioning maybe missing a PM. That wasn't any problem considering how things can happen in life.

I had some of those files that came four in a pack. I think they indeed were pretty low quality.
by Joseph
Wed Aug 08, 2018 8:25 am
Forum: General Discussion
Topic: Beheaded fatty nail as soldering tip...
Replies: 21
Views: 998

Re: Beheaded fatty nail as soldering tip...

haklesup, those thoughts remind me how diamond fingernail files deteriorated much faster than I expected when filing steel nails or black drywall type screws, as far as I can remember.
by Joseph
Tue Aug 07, 2018 11:37 am
Forum: General Discussion
Topic: Beheaded fatty nail as soldering tip...
Replies: 21
Views: 998

Re: Beheaded fatty nail as soldering tip...

Reminds me of when cutting steel with a diamond impregnated circular saw blade. The diamond tends to dissolve.
by Joseph
Sat Jul 21, 2018 8:59 pm
Forum: General Discussion
Topic: Beheaded fatty nail as soldering tip...
Replies: 21
Views: 998

Re: Beheaded fatty nail as soldering tip...

Indeed! You're welcome.

I inserted a rectifier and switch into the cord, so that through the diode is low, and bypassed is high.
by Joseph
Sat Jul 21, 2018 3:16 pm
Forum: General Discussion
Topic: Beheaded fatty nail as soldering tip...
Replies: 21
Views: 998

Re: Beheaded fatty nail as soldering tip...

I found thick grounding wire at the hardware store. I think it is six gauge.
by Joseph
Sat Jul 21, 2018 9:16 am
Forum: General Discussion
Topic: Beheaded fatty nail as soldering tip...
Replies: 21
Views: 998

Re: Beheaded fatty nail as soldering tip...

I like the idea of the bare solid copper wire tip and have done it that way for a long time.
by Joseph
Thu Nov 23, 2017 5:25 pm
Forum: General Discussion
Topic: Another simple amp question
Replies: 16
Views: 1843

Re: Another simple amp question

I refined my circuit today on LTspice. I added the emitter follower on the input like I was thinking earlier, and added another one to buffer the pull-up resistor. I was thinking about lowing the value of the 47ohm resistor since I noticed little or no actual effect by including it in the circuit at...
by Joseph
Mon Nov 20, 2017 5:51 pm
Forum: General Discussion
Topic: Another simple amp question
Replies: 16
Views: 1843

Re: Another simple amp question

I think adding another 2N3904 as an emmitter follower for the input would be good to try.
by Joseph
Wed Nov 15, 2017 2:42 pm
Forum: General Discussion
Topic: Iron wire inductor
Replies: 12
Views: 1428

Re: Iron wire inductor

I think I am probably in the knee region of figure 4 right now (at the last linked site). Yet after further looking at the graph, I think that isn't right. Since power is still a little over half of the rated output by my reckoning, operation has to be on the red (safe part) of the curve. I did noti...
by Joseph
Wed Nov 15, 2017 8:28 am
Forum: General Discussion
Topic: Iron wire inductor
Replies: 12
Views: 1428

Re: Iron wire inductor

I have two microwave ovens, one on power pulsing and the other also on that, but also given voltage reduction. I noticed some of my things needed much more pulsing and for much longer than ovens were set up for. My first oven ended up with stuck timer contacts from too much cycling. I made an extern...
by Joseph
Tue Nov 14, 2017 12:00 am
Forum: General Discussion
Topic: Microwave oven transformer... reversed.
Replies: 10
Views: 2944

Re: Microwave oven transformer... reversed.

Howdy, I had an old Texas Instruments calculator that appears to have predated the TI 30 that had a wall wart using a transformer like that. I seem to recall that it even regulated the output with just a zener diode. Presently I have a choke that I made with a roll of wire as the magnetic core. I wo...
by Joseph
Mon Nov 13, 2017 8:25 pm
Forum: General Discussion
Topic: Iron wire inductor
Replies: 12
Views: 1428

Re: Iron wire inductor

I had an inductor coil in mind that had a small inner diameter, and enough Iayering to make the outer diameter about ten times the inner, or more. Say ¼" inside, 2" outside diameter, and maybe something like 3" long. I haven't been a fan of iron or steel leads because of concerns about corrosion and...
by Joseph
Sat Oct 28, 2017 10:09 am
Forum: General Discussion
Topic: Iron wire inductor
Replies: 12
Views: 1428

Iron wire inductor

What if insulated iron, or silicon steel, for that matter, was made into an inductor so that the wire was to act as both the windings and the magnetic core? It seems like it probably was tried sometime within the past 200 years or so. The reasons it doesn't work, if it doesn't, could be a bit compli...
by Joseph
Fri Oct 27, 2017 9:17 pm
Forum: General Discussion
Topic: Microwave oven transformer... reversed.
Replies: 10
Views: 2944

Re: Microwave oven transformer... reversed.

I dont think he should remove the welds holding the core together just to put in 2 turns. I'd cut out the secondary winding with Plato wire cutters or a knife. Then feed through the new secondary. I once made a twelve Volt power supply that was resistant to damage from shorting out the 12V. It had a...