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Topics - The Radio Shop

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151
Electronic Video Blog / #31 IFR 1200 service monitor problems and fixes
« on: February 24, 2016, 05:38:19 PM »
#31 IFR 1200 problems and fixes.

In this video we take a look inside the IRF 1200 Service monitor.
We will address the low output issue from the T/R jack and have a look at the termination dummy load failure. We then pull the scope/analyzer unit and repair the dirty switches.





https://www.youtube.com/watch?v=J6vjIuqAaEg


My website
http://gokarters.com/smf/index.php?topic=2534.new#new

KG Electronics
http://www.kgelectronics.com/

IFR 1200 service info
http://www.repeater-builder.com/test-equipment/aeroflex/aeroflex-index.html

For great electronic learning tutorials:

Mr. Carlsons Lab
https://www.youtube.com/channel/UCU9SoQxJewrWb_3GxeteQPA

TRXBench
https://www.youtube.com/channel/UClqWe58x9q6jx61gB16731A

152
Electronic Video Blog / 500 subscribers !
« on: February 20, 2016, 11:17:57 AM »
I know this is no big thing to most folks but this gives me a feeling of success.
Cannot believe I have already hit 500 subscribers on my YouTube channel.
At  the end of December I was just below 200, January and February has been 2 booming months.

I started my channel over a year ago. At first I did not really do a lot on my channel but a few noobie videos (not that all my video's are not noob produced). I then backed away for quite some time. About 4 months ago I got back to them and been trying to at least upload one ever 2 weeks.

Just a few folks I like to say thanks to for the inspiration:

Dave, EEVBlog.  Dave encouraged me from the beginning.
Lazarus, An online  forum member and close friend that gave me a lot of ideas.
Peter, TRXBench. His videos has helped me so much and is a good friend.
Paul, Mr. Carlson's Lab.  Found this guy via Peters channel.  Very positive and confident blogger.
Alan, w2aew. One of the masters of tutorial videos.
Shahriar, The Signal Path. Another master of tear downs and repairs.
Shock, another forum user that thought me a few things about reaching out and video prep.

And I have to say a big thanks to all my subscribers because without you, I could not do this.
Another thanks go out to the random viewers, these folks give me the most views and thumbs downs. This lets me know I need to do better.

I know there are more that would fit that list so if you were not mention still thanks.
I am really getting excited about this now.

30 videos uploaded, many more to come.

153
Other Video Blogs / The Rhythm of the Code
« on: February 17, 2016, 08:12:26 PM »
Interesting way to learn code




https://www.youtube.com/watch?v=2_qQZ92onhU




154
Electronic Video Blog / #30 Kenwood TS-50 Part 3 troubleshoot transmitter and repair
« on: February 13, 2016, 11:32:29 PM »
#30 Kenwood TS-50 Part 3 troubleshoot transmitter and repair

Third and final episode.
In this  video we are back on the old Kenwood TS-50. We do a bit of troubleshooting and find yet more interesting faults.

Some blown parts, broken parts, and parts not plugged in. Bare with me as we try and bring this rig back to life.



https://www.youtube.com/watch?v=czIxQqAqjE0

155
Electronic Video Blog / #29 Vintage gear I picked up for future teardowns and restore
« on: February 13, 2016, 08:24:18 PM »
A quick video on some vintage radio and test gear a friend gave me for future repair videos

Pics coming soon




https://www.youtube.com/watch?v=R4MS9R1VdoU


Kenwwod TS-520 service manual
http://www.kg6haf.com/downloads/520S_Service.pdf

Heathkit DX-20 manual and schematic
http://www.mods.dk/manual.php?brand=heathkit

Eico 215 signal generator links

Steve's Web Junkyard
http://www.byan-roper.org/steve/steve-at-play/antique-electronics-and-2/eico-315-signal-generator.html

Phil's Old Radios:
http://antiqueradio.org/eico01.htm

HP model 410 A/B/C ?

Heathkit model HP-23 power supply
http://www.wmsinc.org/N7EBG/heathkitpdf/hp-23_2.pdf



156
Other Video Blogs / Tube Amplifier Troubleshooting Tips "Mr Carlson's Lab"
« on: February 10, 2016, 04:18:35 PM »
Published on Feb 10, 2016
 
Mr Carlson's Lab

Some tube (valve) amp related tips to make your repair faster. Also a Phase Inverter explanation and more.
See below (click the show more tab) for some links to other great people, and their channels.




https://www.youtube.com/watch?v=N75D9293Eb8




Peter @ TRXBench:
https://www.youtube.com/channel/UClqW...

Tom @ AntiqueRadioandTV:
https://www.youtube.com/channel/UCcPa...

Eric Wasatonic:
https://www.youtube.com/channel/UCqIY...

Buddy @ The Radio Shop:
https://www.youtube.com/channel/UCHJp...

John @ Joernone:
https://www.youtube.com/channel/UC738...

Thanks to Brian Benchoff of Hackaday.

http://hackaday.com/2015/05/20/how-to...

Thanks to George Graves of Hackaday.

http://hackaday.com/2016/01/22/lets-p...


157
Electronic Video Blog / #28 Yaesu YO-100 scope monitor troubleshoot and repair
« on: February 07, 2016, 03:00:47 PM »
#28 Yaesu YO-100 scope monitor troubleshoot and repair

In this video we take a look at the YO-100 scope monitor.
We will only use out senses to locate the problems without the use of test gear.  We will test a capacitor with a cheap tester. Lets have a look at what we find.



https://www.youtube.com/watch?v=pIwcVrr2brU


Mr Carlson's Lab
Are Your Capacitors Installed Backwards? Build this and find out
https://www.youtube.com/watch?v=BnR_DLd1PDI

158
Other Video Blogs / #81 Kenwood TS-50 S intermittent no power and other odd behaviour TRXBench
« on: February 06, 2016, 07:09:08 AM »
#81 Radio repair: Kenwood TS-50 S intermittent no power and other odd behaviour 

TRXBench   
 
 Published on Feb 6, 2016


In this episode we have a Kenwood with the known hybrid boards problems but additional to that there is a more hidden exciting fault.



https://www.youtube.com/watch?v=6em059oiLGA

159
Other Video Blogs / #199: Measuring coil inductance and IF transformer resonant frequency w2aew
« on: February 05, 2016, 10:12:48 AM »
Published on Apr 5, 2015


This video shows a simple circuit that was shared by N4TMI in 73 magazine (no defunct, and archives freely available online). It shows a simple 2-transistor oscillator that can be used to test the resonant frequency of an unknown coil / inductor when paired with a known capacitor, as well as the resonant frequency of parallel tuned circuits like IF transformers. This is especially handy for folks that work on old radios and need to identify IF transformers, or want to figure out what value of capacitance to use to resonate with an inductor at a chosen frequency. I show a very handy "slide calculator" that can be used to quickly calculate LC resonant circuit values and frequencies. I made a small modification to the values in the circuit because I used a different N-channel JFET than was used in the article. Here is a link to the original article in 73 magazine from November 1990:
http://archive.org/stream/73-magazine...
And, here is a link to where you can find the handy L/C/F slide calculator:
http://www.arrl.org/shop/L-C-F-and-Si...




160
Other Video Blogs / How Binary Logic Works, Tech Tips Tuesday Mr Carlsons Lab
« on: February 02, 2016, 04:30:51 PM »

Mr Carlson's Lab   
 
Published on Feb 2, 2016

How to understand Binary Logic fast and easy. It's surprisingly simple! This is how your computer, clocks, frequency counters, volt meters, and so on, use binary code. This is the "ground floor" of how binary works.




YouTube link:
https://www.youtube.com/watch?v=VwJ-fTEXw_M

161
Electronic Video Blog / #27 TROUBLESHOOTING AND TESTING A VIEWRS ICOM IC-745
« on: January 31, 2016, 05:08:43 PM »
#27 TROUBLESHOOTING AND TESTING A  VIEWRS ICOM IC-745

In this video I troubleshoot a viewer from South Carolina IC-745. We also have a peek at the PIEXX replacement ram board.
Replacement trimmers from ICOM:
4610000100 (CV05A0601 CTZ51A 6pF) $2.92 each
4610000110 TRMR CV05C1201*VCT51C 12pF $2.92 each
Piexx board
https://www.piexx.com/?main_page=product_info&products_id=26



https://www.youtube.com/channel/UCHJpeSrEjtVk1YtRU3FrpQQ/videos

162
Other Video Blogs / #79 Basics of switching mode power supplys TRXBench
« on: January 27, 2016, 06:59:07 PM »

163
Electronic Video Blog / #26 Yaesu FT-757GX No transmit quick repair
« on: January 24, 2016, 04:46:40 PM »
#26 Yaesu FT-757GX No transmit quick repair

In this video I have a look at a 757GX that has no TX. Owner changed meter lighting and created an interesting easy to fix fault.
Yes at times I do get something easy to repair.



https://www.youtube.com/watch?v=pv38kS8daVk


Service manual
http://www.iw2nmx.it/Yaesu/FT-757GX/FT-757GX%20Service%20Manual.pdf

Modifications and fixes
http://www.normsweb.com/tektips/ft757.shtml

164
Other Video Blogs / #78 Albrecht dead after mixing up the power terminals. TRXBench
« on: January 17, 2016, 07:53:48 PM »
Published on Jan 17, 2016


In this episode we look at the function of the protection Diode. We repair the radio, do a power mod on AM and align AM and FM modulation.




165
Electronic Video Blog / #25 Icom IC-745 repair part 1. tear down and review of problems
« on: January 16, 2016, 05:48:26 PM »
#25 Icom IC-745 repair part 1. tear down and  review of problems

In this video we have a look at Icom IC-745vHF transceiver.
Although this is listed as an all mode rig it does not have AM transmit.
On 24 MHz and up we have an intermitted problem on receive and transmit, this is due to crappy plastic trimmer capacitors in the VCO unit. We will also look at ways to replace the internal battery that holds the information in sram. If this battery dies the unit becomes a brick since it looses all of its factory programming for the cpu.




https://www.youtube.com/watch?v=wxvNi-BB0Xc

Trimmers (current part numbers as of 3/8/2016)
4610000100 (CV05A0601 CTZ51A 6pf)  $2.92 ea...  4 pieces

4610000110 TRMR CV05C1201* VCT51C CTZ51C 12pf  $2.92 ea  6 pieces



IC-745 PLL VCO Trimmer Replacement & 2nd LO Upgrade by Frank A. Ellis W3UHF
http://www.qsl.net/icom/ic745/main.html

Ram battery replacement instructions
http://www.icomcanada.com/techbulletin/tb1/ram_card.htm

ram programming
http://jvgavila.com/soft_ham/icom/ic_ram.htm


ICOMPROM ICOM Non-Volatile RAM Module
https://www.piexx.com/?main_page=product_info&products_id=26


Service manual
http://www.radiomanual.info/schemi/IC745_serv.pdf

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