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Success Stories If you have successfully repaired or restored a piece of equipment, why not write up what you did and post details here. Particularly if it was interesting, unusual or challenging. PLEASE DO NOT POST REQUESTS FOR HELP HERE! |
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12th Dec 2015, 2:03 pm | #1 |
Retired Dormant Member
Join Date: Apr 2011
Location: Wolverhampton, West Midlands, UK.
Posts: 253
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Hacker Black Knight RP74
I purchased this FM only Transistor Portable set as a non worker, totally dead as it had water damage internally which had in time corroded the AF PCB, the IF PCB, the aerial was damaged and also the volume potentiometer & on-off switch was faulty, as well as other components within the set.
Firstly a replacement potentiometer/on-off switch was sought, (50Kohm) but wasn’t as straight forward as first thought, larger ones are available, but due to the space limitations within the set, I decided upon obtaining the replacement from a scrap Hacker Autocrat II RP73 which I had, and had been cannibalised previously for parts for other sets. Fitting the replacement pot from the RP73 had further problems as I found to my dismay, as the shaft length was much shorter on the RP73, which meant that the knob for the volume control would not go on when the front extruded aluminium was fitted onto the RP74, faced with this conundrum, I decided to swap the internal potentiometer track and switch from the RP73, to that of the longer shafted faulty potentiometer of the RP74. This sounded a fairly simple task, but in fact turned out to be a right , however an hour later and several cups of tea, rewarded me with a fully functional volume/on-off switch, which was installed in the RP74. The badly corroded tracks on the various PCB’s were repaired and cleaned off with IPA, any faulty capacitors and other components replaced, dial cord re-stringed also the damaged aerial was replaced, this was purchased online, the ‘Hacker’ front badge was repainted, so were the small blemishes on the front tuning scale (the matt black strip where the knobs are) this was touched up using matt black alloy wheel paint using a small brush, and the sorry looking black Rexine was treated with ‘Kiwi’ shine and protect shoe polish. (the liquid one with the sponge applicator) The only thing which I don’t have is the small aluminium cap on the AFC button, I had one somewhere but can I find it I like repairing these transistor portables, as they are relatively easy to work on, and this one compliments my collection of Hacker Radio’s, I nearly have as many as my AVO Meter collection! The set was well worth the effort put into it, and so another one of these fabulous Hacker sets are saved. More Photo's of the finished radio to follow.... Paul. |
12th Dec 2015, 2:06 pm | #2 |
Retired Dormant Member
Join Date: Apr 2011
Location: Wolverhampton, West Midlands, UK.
Posts: 253
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Re: Hacker Black Knight RP74
More Photo's of the repaired radio...
Paul. |
12th Dec 2015, 5:57 pm | #3 |
Retired Dormant Member
Join Date: Apr 2011
Location: Wolverhampton, West Midlands, UK.
Posts: 253
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Re: Hacker Black Knight RP74
How annoying, I just found the aluminium AFC button bright, looks a lot better now, now I can say it's finished.
Paul. |
12th Dec 2015, 6:01 pm | #4 |
Dekatron
Join Date: Jan 2005
Location: Oxford, UK.
Posts: 17,853
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Re: Hacker Black Knight RP74
Very nice, Paul.
I the similar Silver Knight and was delighted with its performance. Annoying? Surely that's a bit of luck |
12th Dec 2015, 6:58 pm | #5 |
Retired Dormant Member
Join Date: Apr 2011
Location: Wolverhampton, West Midlands, UK.
Posts: 253
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Re: Hacker Black Knight RP74
It’s annoying in the fact I wasn’t looking for it, why do these things turn up when your looking for something else, now I can’t find the solder must be my age!
Paul. |
15th Dec 2015, 10:33 am | #6 |
Rest in Peace
Join Date: Jul 2011
Location: Bridgnorth, Shropshire, UK.
Posts: 787
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Re: Hacker Black Knight RP74
That is a very nice radio. Good repair!
I remember overhauling my Sovereign II. There were stickers on the dial (I remember these being handed out in the 70s) and they were hard work to remove. I have to say: I had no idea Indian Pale Ale was so good for cleaning PCBs Merry Christmas to all. |
15th Dec 2015, 7:18 pm | #7 |
Dekatron
Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,535
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Re: Hacker Black Knight RP74
It's better as a lubricant for repair technicians. A distant cousin does the PCBs
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....__________ ....|____||__|__\_____ .=.| _---\__|__|_---_|. .........O..Chris....O |
15th Dec 2015, 8:25 pm | #8 |
Moderator
Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,957
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Re: Hacker Black Knight RP74
I can vouch for that
Congratulations on this one. I particularly like these 'back from the dead' success stories. |
16th Feb 2016, 11:29 pm | #9 |
Dekatron
Join Date: Apr 2005
Location: Bewdley, Worcestershire, UK.
Posts: 4,748
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Re: Hacker Black Knight RP74
Just seen this thread, Paul. Nicely done, particularly on the volume pot which could have been a show-stopper. Have you got a separate "Hacker Room" similar to your Avo Room?!
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Phil Optimist [n]: One who is not in possession of the full facts |
21st Feb 2016, 5:46 am | #10 |
Heptode
Join Date: Apr 2006
Location: Indianapolis, Indiana, USA.
Posts: 674
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Re: Hacker Black Knight RP74
Elegant.
Bet it can rattle the windows.
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Just playing with high voltage.... |
24th Feb 2016, 8:42 pm | #11 |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Re: Hacker Black Knight RP74
It certainly does. Let's just hope FM broadcasting continues.
DFWB. |