18-02-2014, 05:28 PM
The interesting and intriguing thread ‘over the wall’ on dating Hunt's and Erie caps from their date codes stated:
Quote:
“A.H. Hunt started business in 1901 and specialised in selling batteries. In May 1961 A.H. Hunt set up a capacitor design and manufacturing capability. The name was changed to A.H. Hunt (Capacitors) Ltd”.
“The new business was started on 21 May 1961, which happens to be week 21 of the year, and the preceding Sunday for that week was Whitsun day. So someone decided to use the codename WHITSUNDAY for dating capacitors as it contained 10 none duplicated letters of the alphabet. Also the letters needed to have a corresponding number sequence so 0987654321 was used. The format of the date coded is simply last digit for year followed by the week number:
WHITSUNDAY
0987654321
End quote.
To the best of my knowledge and belief, Hunts capacitor manufacturing capability pre-dates 1961 by quite a long chalk. I’ve no idea when the HUNTS ‘CRB’ Capacitor Analyser (‘CRB' – ‘Capacitance Resistance Bridge’), first appeared on the scene, but I imagine it was pre-war.
Maybe the WHITSUNDAY date code was in use prior to 1961?
Using that code, IAY = 821, so given that 8 is the last digit of the year, it could signify 1938 or 1948 and 21 = Week 21. Given that the set came out in 1936, 1938 would be a bit soon for the smoothing caps to fail, so if the date code does relate to the ‘WHITSUNDAY’ concept, I guess it would be 1948?
As I’ve said before, this model isn’t sought after, unlike the round Ekcos, as evidenced by this AC77 in very nice condition which recently sold for £65.00, but then the likes of us wouldn’t be in the bidding for sets that don’t require pulling to bits and meddling with!
http://www.ebay.co.uk/itm/Vintage-1936-Ekco-valve-radio-model-AC77-in-nice-working-condition-/251426013631?hash=item3a8a2881bf&nma=true&si=hQsXg%252BA1Hu%252BbdGlBnv6IhMc0DnI%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
Quote:
“A.H. Hunt started business in 1901 and specialised in selling batteries. In May 1961 A.H. Hunt set up a capacitor design and manufacturing capability. The name was changed to A.H. Hunt (Capacitors) Ltd”.
“The new business was started on 21 May 1961, which happens to be week 21 of the year, and the preceding Sunday for that week was Whitsun day. So someone decided to use the codename WHITSUNDAY for dating capacitors as it contained 10 none duplicated letters of the alphabet. Also the letters needed to have a corresponding number sequence so 0987654321 was used. The format of the date coded is simply last digit for year followed by the week number:
WHITSUNDAY
0987654321
End quote.
To the best of my knowledge and belief, Hunts capacitor manufacturing capability pre-dates 1961 by quite a long chalk. I’ve no idea when the HUNTS ‘CRB’ Capacitor Analyser (‘CRB' – ‘Capacitance Resistance Bridge’), first appeared on the scene, but I imagine it was pre-war.
Maybe the WHITSUNDAY date code was in use prior to 1961?
Using that code, IAY = 821, so given that 8 is the last digit of the year, it could signify 1938 or 1948 and 21 = Week 21. Given that the set came out in 1936, 1938 would be a bit soon for the smoothing caps to fail, so if the date code does relate to the ‘WHITSUNDAY’ concept, I guess it would be 1948?
As I’ve said before, this model isn’t sought after, unlike the round Ekcos, as evidenced by this AC77 in very nice condition which recently sold for £65.00, but then the likes of us wouldn’t be in the bidding for sets that don’t require pulling to bits and meddling with!
http://www.ebay.co.uk/itm/Vintage-1936-Ekco-valve-radio-model-AC77-in-nice-working-condition-/251426013631?hash=item3a8a2881bf&nma=true&si=hQsXg%252BA1Hu%252BbdGlBnv6IhMc0DnI%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
Regards, David.
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
