Friday, November 3, 2017

Yamaha 650 Quick Carburetor Clean / Repair Series

Seems to be given any amount of time that the jets in the emulsion tube of each carb will clog causing the engine to die just off idle.  Even if the carbs are perfectly clean, this issue causes an interesting closure to form, a perfect circle which reduces the jet size in a uniform fashion.  For these situations it is not necessary to remove the carbs from the bike, and a quick clean of these particular jets can be accomplished.

This Three part series described the whole procedure in detail

Tuesday, October 31, 2017

Commodore 64 Halloween special - Power supplies of Death


This is my attempt at special effects.   Something you will be surprised to know that I don't do professionally.  I do however know a crappy ass power supply when I see one.   You will however find within the video that although both the top and bottom of the sine wave is employed in the rectification for DC I make an observation strictly from a parts perspective (or lack thereof) with regard to their missing diodes, versus a 4 diode bridge rectifier.  All across the internet Pocket protectors spontaneously combusted, slide rules exploded.  Good thing I don't discuss Politics here.  The internet is a rough place, even in ubergeekdom.

So click Here for some Halloween fun and commodore mayhem

Wednesday, October 25, 2017

The FLDIGI to FT817 QRP Station Video Series has arrived

This video series demonstrates how easily a QRP station can be set up with a minimum amount of hardware.  Using an FT-817, a linux laptop and a Buddipole antenna we go through step by step from the beginning all the way through to completion.

Click here for more

Saturday, October 14, 2017

Marshall 6100LM Anniversary Series super quick Bias repair

Posed with the issue of having to do the bare minimum to fix the problem, i'm joined by special guest star Kris from Cornerstone music as we try to determine the best way to stop output tubes from exploding in this amplifier.


Click here for more info. 

Monday, September 11, 2017

Super Serial Switch Setting Status

     Ok, So I thought i'd bring this all together and try out just a few more tricks before moving onto something more comprehensive.  Having automatically identified the slot assignment and storing the value in zp SLOT $07 we can do some useful things with it Like retrieve and decode the status of the dip switches on the Super serial card.

Click here for this next Apple II project that i've assembled.

Wednesday, August 30, 2017

Super Serial Makes a Personal Discovery

   This seems like the next possible task for such a device. I've kept a yellow post-it note under the monitor with a listing of what card resides in which slot and have often lost it. Having to then remove the monitor to retake inventory of the system.  This seemed like a good time for the next evolution of code, definitely not as complicated as the IRQ issue, but requiring some thought, none the less.

    In the next project we auto detect the SSC card and store the slot

Wednesday, August 23, 2017

Super Simple Super Serial Sample Source

     I have struggled to find the most basic of information about Apple II related machine coding information. Its not as freely available as people would like to have themselves believe it is. In searching, having often found the same struggles of others in the past, some who had given up years ago for lack of understanding or availability of information. While that is subjective, there is as it seems, a complete black hole with regard to several facets of the platform

Click here to see the Apple II project I have started with regard to the SSC

Saturday, July 30, 2016

Fender Reverb Deluxe

Fender Reverb deluxe Repair and refresh. This amp was in mint condition and just required age related service.






Click here for more info



Friday, July 8, 2016

Danelectro Model 272

Nice sounding AMP, when it works, weird design, low quality parts and built like a deathtrap.  Very interesting.....


Click here for more info.....


Thursday, June 2, 2016

1959 Gibsonette GA-8

Awesome simple single ended Gibsonette 6V6 amplifier from 1959. Initially arrived at my door broken because one filter cap had shorted and caused a fire which burned through the other filter cap.  


Click here for more info



Thursday, May 5, 2016

Collection of APRS and packet software installations on linux

Here are Some videos Ive posted on Youtube that include some HAM radio experimentation work done in the April-May timeframe.  Also included is some FREEDV digital voice work.

Click here for more.......... 

Tuesday, April 12, 2016

TAPR TNC-1 restoration

Restoration and operation of the TNC-1


The first generation Packet TNC is going back online using the venerable Apple][.     No content yet but some photos in the link here

Sunday, February 7, 2016

Commodore 64 (board REV C) and older 1541 replacement capacitors from Newark (Element 14)

At this point, any electrolytics in the Commodore are suspect.  Since replacement is so cheap, and failure so expensive, Ive compiled a list for Newark (Element 14) for capacitor replacement.

Click here for more info


Sunday, December 13, 2015

The Adventures in repair and recalibration of the HP 331A

Here is my information on the repair and calibration of the HP 331A THD analyzer from the 1960's which is now in working condition and on the bench


Link to My post in EEVBLOG

Heres the Movie on Youtube

Friday, November 20, 2015

ST70 Resurrection PART 9

ST70 Resurrection PART 9

The first test of basic distortion displayed, we run some real tunes through it.  Notice the top of the waveform distorts before the bottom.   This will be covered in the next video

See Part 9 here.......

Sunday, November 8, 2015

ST70 Resurrection PART 8

ST70 Resurrection PART 8

Testing of the input signals to the outputs of the 7199's are done showing two outputs exactly 180 degrees out of phase and an injection of an audio signal to display on the oscilloscope

See Part 8 here.......

Wednesday, November 4, 2015

ST70 Resurrection PART 7

ST70 Resurrection PART 7

This chapter deals with the summary of the electrolytics, testing and repair of the PC-3 board and other fun stuff

See Part 7 here.......

Sunday, November 1, 2015

ST70 Resurrection PART 6

ST70 Resurrection PART 6

Revisiting the mistakes from the last video, everything is retested on the PCB and several tubes are selected until a good match is made

See Part 6 here.......

Wednesday, October 28, 2015

ST70 Resurrection PART 5

ST70 Resurrection PART 5

Revisiting the mistakes from the last video, everything is retested on the PCB and several tubes are selected until a good match is made

See Part 5 here.......

Saturday, October 24, 2015

ST70 Resurrection PART 4

ST70 Resurrection PART 4

Here measuments are made of the bias circuit before and after replacing the two 50uf capacitors with higher rated 100uf caps, showing not only more stability but a cleaner DC signal.   Tests are made to the ABCD DC power for the plate voltages but A and B report high due to the missing 7199's to load them down

See Part 4 here.......