Search found 45 matches

by Bygar
Sat May 14, 2011 2:06 pm
Forum: General Discussion
Topic: Tube Data
Replies: 7
Views: 3293

Re: Tube Data

RE: WX5013P1, Did they possibly use a date coding system on these ol CRT's. E. G. 50 was the year 1950, 1, the month. date. rshayes: Do you have documentation for the EICO Model 435 scope? If so could you possibly scan it and send a PDF copy. If so please advise. Thanks. Found some data project can ...
by Bygar
Mon May 02, 2011 10:47 pm
Forum: General Discussion
Topic: Toroidal Transformers in Canada?
Replies: 18
Views: 6918

Re: Toroidal Transformers in Canada?

Are you still looking for toroid transformers in Canada. I found my Hammond mfg. electronic transformer cat.5C-88. Page 10 lists their toroid transformers, several units will meet your requirements. All are dual primary and secondary units, those with your current requirements are open (not potted),...
by Bygar
Mon May 02, 2011 2:47 pm
Forum: General Discussion
Topic: Current limits for printed circuit board traces
Replies: 11
Views: 2935

Re: Current limits for printed circuit board traces

PCB trace width rule of thumb, 1/16", 1oz., 5 Amp., 20 degree C rise.
Double for 2 oz.
Half for 1/2 oz.
by Bygar
Mon May 02, 2011 7:08 am
Forum: General Discussion
Topic: 24V DC to 3 phase...
Replies: 9
Views: 2591

Re: 24V DC to 3 phase...

For 3 phase from 24V d.c.
Look into brushless D.C. motor controls used in hobby applications.
They are available in many sizes.
Usually only fractional H.P. at 24 volts but are 3phase.
Hope this helps.
Bygar
by Bygar
Mon May 02, 2011 6:13 am
Forum: General Discussion
Topic: Winding a Toroidal Ferrite Core
Replies: 13
Views: 3449

Re: Winding a Toroidal Ferrite Core

Wire sizing for transformers! What type of service will it be used for? Amps per circular mil, your choice. AWG, 10 gauge wire =10,000 circular mil. As you move higher in gauge E.G. to 13 gauge = 5,000 circular mil. For every 3 change in gauge divide circular mil by 2 or multiply by 2. Depends on if...
by Bygar
Mon May 02, 2011 5:46 am
Forum: General Discussion
Topic: CA3140 substitute question
Replies: 12
Views: 3217

Re: CA3140 substitute question

Why use a sub when you can still get the real thing;
I have recently purchased Ca3140 OP AMP's at less than $1 U.S.
Try Bgmicro or SMC. They are both on the internet.
Hope this helps.
Bygar
by Bygar
Sun May 01, 2011 1:04 pm
Forum: General Discussion
Topic: GEIGER MULLER TUBES, WHERE DO I FIND ONE THESE DAY
Replies: 5
Views: 2412

Re: GEIGER MULLER TUBES, WHERE DO I FIND ONE THESE DAY

I found an article for a radiation counter in an older issue of Electronics, Published by McGrawhill. It was in the Designers casebook section. Sorry I didn't set it aside. It used a modified PhotoPINdiode specified as large area. The main mod was to replace the window with an aluminum window. It wa...
by Bygar
Sun May 01, 2011 12:39 pm
Forum: General Discussion
Topic: PCB Layout Software
Replies: 10
Views: 3498

Re: PCB Layout Software

The price was right for Eagle PCB software. It is available as freeware. Although limited to board size and only two layers. It works for me. It does have a fairly steep learning curve. Most PCB software does! It produces great positive artworks. There are many small tricks to achieve good results t...
by Bygar
Sun May 01, 2011 12:25 pm
Forum: General Discussion
Topic: Tube Data
Replies: 7
Views: 3293

Re: Tube Data

Thanks for the encouragement. I found a site that lists the CRT for EICO model 430 which may be the generic number 3DEP1. I would like to find the data for same. I have good article to build a portable scope. Hope someone has the data. Bygar
by Bygar
Thu Apr 21, 2011 10:56 am
Forum: General Discussion
Topic: WTB: MM5311 BCD clock IC's
Replies: 3
Views: 1720

Re: WTB: MM5311 BCD clock IC's

RE: LM5311 clock chip I still have 2 one has suffix "N " the other has suffix "D" I bought them new never used them. I used LM5314 in several clocks I designed. I won't give them away but for a reasonable price you can get me to part with one. Bygar
by Bygar
Wed Apr 20, 2011 8:03 pm
Forum: General Discussion
Topic: Toroidal Transformers in Canada?
Replies: 18
Views: 6918

Re: Toroidal Transformers in Canada?

Try almost any electical or electronic distributor in Canada.
Most handle Hammond transformers. If unable to find 50Volt center tapped
units try 48 volt center tapped.
Bygar
by Bygar
Sun Apr 10, 2011 9:12 am
Forum: General Discussion
Topic: Tube Data
Replies: 7
Views: 3293

Tube Data

Specification sheet desired (required) or copy.
For the following CRT: WX5013 P1, Westinghouse Electronic Tube.
Thanks Bygar
by Bygar
Sun Apr 10, 2011 8:37 am
Forum: General Discussion
Topic: PCB Trace Width
Replies: 5
Views: 1628

Re: PCB Trace Width

PCB trace widths
1. Rule of thumb with 1oz. copper 1/16" trace at 5 amps will give 20 degree C. temperature rise,
adjust width/thickness to suit.
2. Overlay solder and or wire to increase current capacity,.
Bygar
by Bygar
Sun Apr 10, 2011 8:27 am
Forum: General Discussion
Topic: 3 Phase 110 VAC 1/4 horse power motor
Replies: 18
Views: 5127

Re: 3 Phase 110 VAC 1/4 horse power motor

Interesting but not impossible. A. Radio control model use 3 phase brushless D.C. motors some use upwards of 60 volts, use one these controllers would probably work. B. Machine tool suppliers often use 3 phase motors, some use rotary converters, others especially small H.P. use solid state converter...
by Bygar
Sun Apr 10, 2011 7:48 am
Forum: General Discussion
Topic: GEIGER MULLER TUBES, WHERE DO I FIND ONE THESE DAY
Replies: 5
Views: 2412

Re: GEIGER MULLER TUBES, WHERE DO I FIND ONE THESE DAY

:smile: I vaguely remember an article that used a neon lamp I.E. Ne2 as a detector. To improve sensitivity you can use diamond sanding or grinding powder to thin the wall of the neon lamp. Which will improve sensitivity. Hope this helps. Bygar