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Messages - kinkydoints

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31
Test Equipment / Re: heathkit sb 614
« on: January 17, 2017, 08:22:48 PM »
Ok Got my replacement caps in... these are not the HV kit these are to replace the ones that looked original and were not in the HV kit.. Now for the caps that came with the HV circuit kit . there are three 1600 v .1mfd caps in the kit and look similar to the ones that are in the unit now, as im looking at this unit these have been replaced before...but look at the three cap set, the center is in opposite of the two that are on each side. OK question are these caps polarized ? there are no markings to pos or neg , both leads are the same length . as I look at the new ones there is a folded over lead ,all of these caps are printed on and are in the same orientation ,as far as the print on the cap and the folded end. pos or neg that is the question?
would a reversed cap cause issues down the line on other components?  thanks 

32
Test Equipment / Re: heathkit sb 614
« on: January 14, 2017, 07:34:32 AM »
Thanks for the feedback k7rmj Im getting all my parts together and will getthis nice old monitor back to work again.

33
Test Equipment / Re: heathkit sb 614
« on: January 13, 2017, 06:49:18 PM »
Im not a electronic wiz but if I can read the schematic the voltage is 290 vdc indicated by a oval with the 290 in it going to c128 70 mfd cap , c128 is grounded to circuit board ground, 209 vdc continues to r156 and r155 by zd 101 zd 102 to the c124 cap 70 mfd  to +180v "source" looking at the fold out schematic on page 103. I will need a 290 v or better cap in these two spots?  Im trying here guys.  but are caps listed a ac volts?

34
Test Equipment / heathkit sb 614
« on: January 12, 2017, 05:53:39 PM »
I have gotten my HV circuit kit to replace caps and resistors on the high voltage circuit , on examination looks like these parts may have been changed at some point. There are two 70 mf caps next to the 3   0.1mfd +-10% 1600vdc cdent caps...these two aluminum caps do look original see pic for the location . The parts book call for these to be 70 mfd  electrolytic... but no idea of the voltage of these two big caps. Id like to change them also.  they are at c128 c124 on the board. on page 25

35
Test Equipment / Parts for my Heathkit SB 614 station monitor
« on: January 09, 2017, 04:35:17 PM »
I just found a site that has /or will assemble the Heathkit SB-6XX High Voltage Repair Kit This kit of parts contains the typical parts necessary to rebuild your scope's High Voltage and get the brightness and focus working again. The original resistors were of the carbon composition type and these are known for drifting 'high' in value over time. In the kit you will find replacement parts for the two 3500 Volt diodes, the three 1600 Volt high voltage filter capacitors, plus various resistors to replace those in the high voltage circuit around the focus, brightness, and accelerator circuits. These are typically the parts that fail over time with normal operation.

The high voltage capacitors are Cornell Dubilier and the high voltage diodes are Vishay. All of the replacement resistors are quality film type that will not drift over time as did the originals. The kit includes 'easy to follow' instructions for replacing the necessary parts in your particular scope.

they had other kits as well not sure if I can paste a link but ...here it is

http://www.d8apro.com/NewKits.html 

36
New member welcome / Re: Newbie...
« on: January 07, 2017, 07:03:31 AM »
I have noticed that there are sites that have practice tests for the novice side, reviewed my technician No Code plus book that I picked up back in the day as well as the cassette tapes with the cw practice on them...lost my cassette player??? ha ha. but took one of the tests with no real studying and results were good 80 % correct would have passed that one no trouble. still have the knowledge I learned 25 yrs ago. Im hooked. 

37
New member welcome / Newbie...
« on: January 05, 2017, 07:47:42 PM »
wow can't believe that I haven't found this site until now. I have been a radio nut for a long time , Dad had his hr2510 10 meter setup for a long time in the '80's with his passing I ended up with the very radio that got me interested in the "cb" thing back in the day. In the mid 90"s I found myself installing this in my truck with all the stuff he had setup. There is a palomar 250 amp , mobile antenna tuner , swr/power meter , I added a 102 " whip to the mix .  back then to get a ham novice you needed cw to complete the license , and I tried to get that into my head but failed to go all the way. built long line antennas to test for fun and learn more on how to DIY . changed jobs were I lost the extra time to keep this fire going. I moved just a few months ago and found the rig in a box and got my interest up again. well this got me to the point of getting a heathkit sb614 station monitor . My goal is to get that old monitor up and running by rebuilding , refurbishing this old unit. I will need to get all the bits together , I did find a parts list for the unit and need to get some help with the best way to get these bits... caps, resistors and such. I have in the past done some small soldering on boards but not like this project. At the time in the 90's I did use the unit on side band to talk to a station in southern Australia . Well after all this time I think I would like to get the 2510 upgraded with cap/res replaced by someone better than me...ha ha , I might be able to handle that old heathkit but ... I let the radio go to a pro. to refurbish . any  Ideas on best place to start on my sb614 as far as parts?

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