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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
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24th Oct 2011, 8:16 pm | #1 |
Triode
Join Date: Jul 2011
Location: Cambridgeshire
Posts: 43
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Cr100
Hi, Could anyone advise me as to whether a CR100 would be a realistic candidate for restoration for one (such as me) with limited experience, but having lots of enthusiasm and patience? Are there any common difficulties, and are parts obtainable please?
I would be grateful for any advice. I was thinking of restoring an HRO, but have been offered a CR100. Many thanks.....Mike |
24th Oct 2011, 8:47 pm | #2 |
Heptode
Join Date: Jan 2008
Location: Birchington Kent, UK.
Posts: 596
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Re: Cr100
Hello Mike
CR100s are always worth a go. The tubular, ‘bolt-on’ capacitors will usually all need to be changed. From memory, 25 – 30 of them, all 0.1uF 450v. I used the polystyrene ‘block’ type because they were available, and could be bolted to the chassis using tags. The resistors often will be high in value, and will need to be replaced. The cord drive for the band-change drum has a habit of breaking. To work on them, I found it easiest to remove the case and front cover, and bolt four up-rights to each corner of the chassis, so it could be turned upside down to work on the chassis underside. This can be seen on the CR100 adorning the floor of my workshop. I like working on them, but you can have too many ! Good luck Pete |
24th Oct 2011, 8:55 pm | #3 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Cr100
Hello Pete, the temporary legs idea is good.
Lawrence. |
24th Oct 2011, 8:56 pm | #4 |
Dekatron
Join Date: Sep 2005
Location: Seaford, East Sussex, UK.
Posts: 5,997
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Re: Cr100
It has the advantage of an onboard PSU but the dissadvantage that you will require 6 months training before you can lift it.
Pretty easy to work on. It really needs a wobbulator to align the IF. Usual paper capacitor problems and drifted resistors. I haven't heard of any common problems but others may know more. |
25th Oct 2011, 7:36 am | #5 |
Nonode
Join Date: May 2007
Location: Preston, Lancashire, UK.
Posts: 2,511
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Re: Cr100
Brittle rubber wiring insulation is a common problem.
Andy |
25th Oct 2011, 7:51 am | #6 |
Rest in Peace
Join Date: Feb 2008
Location: Dorset, UK.
Posts: 947
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Re: Cr100
When working, the CR 100 perfoms well and is worth having as a receiver, even in today's conditions.
One thing is for sure, take the time to restore it and at the end, you will know far more about them, and receivers in general, than you do at the start! |
25th Oct 2011, 6:19 pm | #7 |
Hexode
Join Date: Jun 2005
Location: Buntingford, Hertfordshire, UK.
Posts: 362
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Re: Cr100
I too have a cr100 wip (well 4 actually). IF/RF coils are giving me grief on No1 and I won't move on to number 2 until 1 is finished, but I have managed to pick up some spares at a few of chas's auctions.
Why not bring it to the AR88 convention in Cottered in a few weeks time. I have a manual if you've not got one, although I think VMARS has one listed. It's all relative to be honest, I like boatanchors, yes they all have there points, some good some bad but mostly we're talking technology thats 60+years old - in it's day it was all cutting edge and all had it's part to play in shaping the way we communicate today. It will be a good start and there's plenty of help on hear to guide you. Go for it! Onewatt
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BVWS, VMARS, RSGB, DEHS, RAOTA Nothings too big or too heavy, otherwise it wouldn't be where it is! |
25th Oct 2011, 7:07 pm | #8 |
Triode
Join Date: Jul 2011
Location: Cambridgeshire
Posts: 43
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Re: Cr100
Many thanks to all. I am very grateful for your comments.
I like the idea of taking my time and using the experience to learn.....good one! Kind regards......Mike |
26th Oct 2011, 2:45 pm | #9 |
Tetrode
Join Date: May 2008
Location: Huntingdon, UK.
Posts: 78
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Re: Cr100
I have a CR100 in which the mains transformer went open circuit. Someone told me that this was a fairly common problem with them. However if anyone has a collection of CR100s where the transformers are OK but everything else is useless I am on the lookout for one.
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26th Oct 2011, 4:00 pm | #10 |
Dekatron
Join Date: Aug 2007
Location: W.Butterwick, near Doncaster UK.
Posts: 8,932
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Re: Cr100
Hi Richard,might be worth an advert under parts wanted.
David GM8JET |
26th Oct 2011, 4:59 pm | #11 |
Retired Dormant Member
Join Date: Mar 2006
Location: Sheffield, South Yorkshire, UK.
Posts: 1,587
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Re: Cr100
Or you could have a word with Ed Dinning , he may be able to rewind you your transformer.
Mike |