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Topics - KC4UMO

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Vintage Ham Equipment / AB Standard Receiver
« on: August 29, 2014, 10:03:47 AM »
I picked this up a few years ago. Would love to restore the old thing but there is no infomation on the web about it.
Will flood pictures here.

Vintage Ham Equipment / My old Swans and siltronix and boat anchors
« on: July 19, 2014, 08:55:08 AM »
My collection

CB Radio Repair manuals and documentation / B&K 2040 service manual
« on: August 21, 2013, 12:38:38 PM »
Here is the B&K 2040 service manual

Home Brew And Tech Forum / home made counter scope preamp
« on: June 20, 2013, 10:47:42 AM »
You can use this circuit for you scope or counter. It is a preamp that works fairly good as a sniffer circuit.
Build in a metal box with a 9 volt battery, toggle swith and a 3 inch piece of coax as a probe. Connect to counter and read the oscilators without connecting them.

CB Radio Repair Forum / R27 receiver
« on: June 11, 2013, 08:45:12 PM »

Basic beginner Electronics / Learning Electronics
« on: April 28, 2013, 12:10:37 PM »
There are tons of stuff to help you learn electronics. One of my favorite sites is YouTube. Check it out.

CB Radio Repair manuals and documentation / cook book
« on: March 27, 2013, 01:37:31 PM »
Anyone know where the cook book files are?

Home Brew And Tech Forum / Kenwood TS-520- VFO warble
« on: February 21, 2012, 07:13:55 AM »
VFO warbles, hard to tune in a station. Loose receive when turning the VFO

VFO capacitor has tarnished at the clip end

There are two ways to remedy the problem.

First way:
Remove top cover from radio.
Looking down at the VFO unit on the driver tube side you will see a small plate with two machine screws holding it on the VFO cover.  With a right angle screwdriver remove the two screws. This will expose the VFO capacitor. Spray electrical cleaner onto the end of the shaft while turning the VFO. Re-lube the shaft and reassemble. This should work for a while.

Second way:
Remove all knobs from front of radio.
Remove face plate.
Remove VFO bearing with the two screws
Remove the dial
On top of the VFO unit there are 2 screws that hold the LED board in, remove them. Now remove the 4 screws that hold the VFO, 2 on top and 2 on bottom.
Remove the fixed channel board directly behind the VFO, you will also need to remove the support.
Now unplug the VFO and remove it by tilting the rear upwards and pulling it back. 
Remove the rear nut and two top and bottom screws. Remove cover.
Remove the 2 screws that hold the jack in place. Pull the jack out of the slot.
Unsolder the black and red wire.
Loosen the 2 screws on the shaft end. When you fully open the cap you will get to the last screw.
Remove the 4 screws holding the capacitor in.
Remove the stop pin in the rear of the cap.
Put capacitor over a bowl and loosen the nut that holds the rotor in place. Then screw the pivot out.  There is a small ball bearing there so hold the unit over the bowl so it is not lost.

Now hold the cap with the shaft pointing up and press down on the shaft to release the front ball bearings.  You may have to play with them a bit to remove since the grease holding them is over 30 years old.
Fully open the cap and remove the rotor from the stator.
Clean the shorting fork and end of shaft with cleaner and a small brass brush.
Fully clean all parts.
Now reverse the procedure and put all back together
Lube the bearings and gears as you reinstall them.

Unit should be good for another 30 years.

CB CHAT / The Shop
« on: February 05, 2012, 12:51:59 PM »
Here are shop pics. It is a mess.

RADIO MODS / D&A schematic
« on: January 25, 2012, 06:36:44 AM »

Paranormal Investigating / T.A.P.S.
« on: January 13, 2012, 05:36:20 PM »

I love this show.
I think Jason and Grant do an excelent job.

Announcements / Mods installed on board
« on: January 12, 2012, 03:59:32 PM »
Color user groups
Who has been online toaday
Chat box.

There is a bug in chatbox I have to work out then it will be usable.

Site Changes and suggestions / New board errors
« on: January 09, 2012, 06:17:48 AM »
Ignor this thread please

Announcements / Board Change notice
« on: January 06, 2012, 12:02:17 PM »
Hi All, the website is getting ready for a change and a upgrade. We will be switching to SMF software. We can then open the board for new members and get it back running. This change will happen with in the next week.

How CB radio works / The homemade service monitor
« on: December 18, 2011, 11:42:59 AM »
the case

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