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Homebrew Equipment A place to show, design and discuss the weird and wonderful electronic creations from the hands of individual members. |
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16th May 2020, 6:12 pm | #1 |
Octode
Join Date: Feb 2018
Location: Southampton, Hampshire, UK.
Posts: 1,051
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TA7642 radio using a giant vintage tuning capacitor
Thanks to a kind forum member, I obtained a vintage 'giant' tuning capacitor last year. Not sure if this is as big as they get. I was unsure of its capacitance range but thought of connecting it to my homebrew TA7642 based TRF MW radio and try it out. I am happy to report it works nicely. I can receive 4 stations clearly now. Will wait to see how it performs tonight.
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16th May 2020, 6:34 pm | #2 |
Dekatron
Join Date: Oct 2003
Location: Croydon, Surrey, UK.
Posts: 7,548
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Re: TA7642 radio using a giant vintage tuning capacitor
Looks like a three gang 500pF....quite a standard item in sets fitted with an RF amp or bandpass tuning. Most standard sets would have used a two gang of the same values.
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16th May 2020, 8:43 pm | #3 |
Octode
Join Date: Feb 2018
Location: Southampton, Hampshire, UK.
Posts: 1,051
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Re: TA7642 radio using a giant vintage tuning capacitor
Thanks. Roughly how old would the tuning cap be and was it for a valve set ?
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17th May 2020, 9:36 pm | #4 |
Dekatron
Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,527
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Re: TA7642 radio using a giant vintage tuning capacitor
Anywhen from early '30's to mid '60's.
Probably!
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18th May 2020, 2:44 pm | #5 |
Guest
Posts: n/a
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Re: TA7642 radio using a giant vintage tuning capacitor
Anywhen, a new word to me, I like it.
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18th May 2020, 5:15 pm | #6 |
Octode
Join Date: Feb 2018
Location: Southampton, Hampshire, UK.
Posts: 1,051
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Re: TA7642 radio using a giant vintage tuning capacitor
@Herald: thanks. It's not quite a fossil but getting there ( :
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18th May 2020, 10:30 pm | #7 |
Dekatron
Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,527
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Re: TA7642 radio using a giant vintage tuning capacitor
OED lists it thus:
"nonstandard (chiefly English regional and humorous)" Anytime So some sort of provenance
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....__________ ....|____||__|__\_____ .=.| _---\__|__|_---_|. .........O..Chris....O |
24th May 2020, 3:55 pm | #8 |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,676
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Re: TA7642 radio using a giant vintage tuning capacitor
Here are a couple of my "giants".
When I started in this game they were normal sized receiving types.
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