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Electronics Thread
piequal3because14
Angel of Love from Heaven
User ID: kaput
01-21-2018 10:02 PM

Posts: 30,264




Post: #1
Electronics Thread
Advertisement
Old and new.

I'll start with some Telefunken vintage radios.


[Image: EG3W6iW.jpg]


and Telefunken Romancero,

[Image: fII1Ne5.jpg]

Look into my eyes to see a Paradise of Love

https://www.youtube.com/watch?v=lqtHu0XFal0

https://www.youtube.com/watch?v=wo7PY4vbQLE

https://www.youtube.com/watch?v=LTm9ui-26F0
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Monk-1
Registered User
User ID: 1337
01-21-2018 10:03 PM

Posts: 5,687




Post: #2
RE: Electronics Thread
Ah i like the new electric beat going around. yeah3
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piequal3because14
Angel of Love from Heaven
User ID: 1337
01-21-2018 10:06 PM

Posts: 30,264




Post: #3
RE: Electronics Thread
[Image: DVVOUGl.jpg]

Look into my eyes to see a Paradise of Love

https://www.youtube.com/watch?v=lqtHu0XFal0

https://www.youtube.com/watch?v=wo7PY4vbQLE

https://www.youtube.com/watch?v=LTm9ui-26F0
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piequal3because14
Angel of Love from Heaven
User ID: 1337
01-21-2018 10:06 PM

Posts: 30,264




Post: #4
RE: Electronics Thread
Monk-1  Wrote: (01-21-2018 10:03 PM)
Ah i like the new electric beat going around. yeah3
Jhikpghf

Look into my eyes to see a Paradise of Love

https://www.youtube.com/watch?v=lqtHu0XFal0

https://www.youtube.com/watch?v=wo7PY4vbQLE

https://www.youtube.com/watch?v=LTm9ui-26F0
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Monk-1
Registered User
User ID: 1337
01-21-2018 10:11 PM

Posts: 5,687




Post: #5
RE: Electronics Thread
piequal3because14  Wrote: (01-21-2018 10:06 PM)
Monk-1  Wrote: (01-21-2018 10:03 PM)
Ah i like the new electric beat going around. yeah3
Jhikpghf

nback. nback nback nback
(This post was last modified: 01-21-2018 10:12 PM by Monk-1.) Quote this message in a reply
Pasta Lover
Registered User
User ID: 1337
01-21-2018 10:18 PM

Posts: 9,463




Post: #6
RE: Electronics Thread
I like these.

[Image: MG_0706-LB.jpg]
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Pasta Lover
Registered User
User ID: 1337
01-21-2018 10:21 PM

Posts: 9,463




Post: #7
RE: Electronics Thread
I have a set of these. They are quite lovely.

[Image: DSCF1207adc1.JPG?action=dlattach;topic=8...ttach=3078]
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PuddyCat
⚡⚡I Want Tuna⚡⚡
User ID: 1337
01-21-2018 10:23 PM

Posts: 23,888




Post: #8
RE: Electronics Thread
piequal3because14  Wrote: (01-21-2018 10:06 PM)
[Image: DVVOUGl.jpg]

This is the GECoPHONE Junior Crystal Set BC1700. Built by GEC (UK) in 1925, this simple crystal set is housed in a polished mahogany case. Connection points for the aerial, earth and headphones are provided, and the controls comprise a tuning knob and a lever to adjust the detector. The set would have cost 15s 0d in 1925 with the 1600m Loading Coil costing an extra 7s 6d.

At the back of the set is the 'Entirely British Manufacture' BBC stamp.

For more information on the BBC Stamp and Post Office registration scheme that was in operation during the 1920s follow this link: BBC Stamp.

The circuit diagram for the set is shown below:

[Image: gecophone%20junior%20cct%2001.BMP]

The aerial (antenna) is connected to either terminal 'A' or terminal 'B' dependant upon its length. Long aerials were connected to 'A' and medium length aerials to 'B'. A long aerial has significantly more capacitance (to earth) than a medium length aerial but the tuning control needs to have roughly the same tuning range for either. Taking the long aerial connection to a tap some way down the tuning inductor reduces its loading on the aerial tuning circuit to roughly the same as for a medium length aerial connected to 'B'. Hence the tuning range remains roughly constant. For MW operation a shorting link is fitted to the 'Loading Coil' terminals. The detector is of the galena/cat's whisker type. A picture of the detector is shown below:

[Image: detector7.JPG]
galena/cat's whisker detector

The galena crystal is held in the screw-cup to the left and the cat's whisker (a curly piece of wire) is held in a sort of pin-chuck to the right. In operation, the handle attached to the cat's whisker is carefully slid in and out and/or rotated so that the cat's whisker drags across the surface of the crystal. The crystal is covered in many contact sites that will allow rectification to take place. With careful adjustment the cat's whicker will fall upon one of these sites and a when this happens a detector is formed. Follow this link for more information on Crystal Sets. The audio output from the detector is connected to the headphones via terminals marked 'T' ('T' for 'telephones' as they were know then). Two sets of headphones can be connected in series by making use of a third, unmarked, terminal between the two 'T' terminals. Not that there is no RF decoupling capacitor connected across the audio output as was often seen on other crystal sets. No doubt the designer felt that the headphones themselves have sufficient capacitance for the task. For reception of the 15kW 5XX station on 1600 metres (broadcast from the Marconi works in Chelmsford, England) the 1600m Loading Coil could be plugged in.

http://earlywireless.com/gecophone_junior_picinfo.htm

Now that is HISTORY of early wireless a simple Crystal radio Cheer

Politics only interests me because it transforms
people into dribbling nincompoops (The World Is Mad)

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Pasta Lover
Registered User
User ID: 1337
01-21-2018 10:24 PM

Posts: 9,463




Post: #9
RE: Electronics Thread
I used to have a set of these. They flat out rocked.

[Image: 536405-carver_amazing_ribbon_speakers.jpg]
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piequal3because14
Angel of Love from Heaven
User ID: 1337
01-21-2018 10:27 PM

Posts: 30,264




Post: #10
RE: Electronics Thread
Pasta Lover  Wrote: (01-21-2018 10:18 PM)
I like these.

[Image: MG_0706-LB.jpg]
Nice!

Look into my eyes to see a Paradise of Love

https://www.youtube.com/watch?v=lqtHu0XFal0

https://www.youtube.com/watch?v=wo7PY4vbQLE

https://www.youtube.com/watch?v=LTm9ui-26F0
Quote this message in a reply
Clucker
Water? Like from the toilet?
User ID: 1337
01-21-2018 10:27 PM

Posts: 1,804




Post: #11
RE: Electronics Thread
I recently saw a PBS special about Edison and how he invented some of these old timey electronic gizmos. It was quite interesting.

Bawk
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piequal3because14
Angel of Love from Heaven
User ID: 1337
01-21-2018 10:28 PM

Posts: 30,264




Post: #12
RE: Electronics Thread
PuddyCat  Wrote: (01-21-2018 10:23 PM)
piequal3because14  Wrote: (01-21-2018 10:06 PM)
[Image: DVVOUGl.jpg]

This is the GECoPHONE Junior Crystal Set BC1700. Built by GEC (UK) in 1925, this simple crystal set is housed in a polished mahogany case. Connection points for the aerial, earth and headphones are provided, and the controls comprise a tuning knob and a lever to adjust the detector. The set would have cost 15s 0d in 1925 with the 1600m Loading Coil costing an extra 7s 6d.

At the back of the set is the 'Entirely British Manufacture' BBC stamp.

For more information on the BBC Stamp and Post Office registration scheme that was in operation during the 1920s follow this link: BBC Stamp.

The circuit diagram for the set is shown below:

[Image: gecophone%20junior%20cct%2001.BMP]

The aerial (antenna) is connected to either terminal 'A' or terminal 'B' dependant upon its length. Long aerials were connected to 'A' and medium length aerials to 'B'. A long aerial has significantly more capacitance (to earth) than a medium length aerial but the tuning control needs to have roughly the same tuning range for either. Taking the long aerial connection to a tap some way down the tuning inductor reduces its loading on the aerial tuning circuit to roughly the same as for a medium length aerial connected to 'B'. Hence the tuning range remains roughly constant. For MW operation a shorting link is fitted to the 'Loading Coil' terminals. The detector is of the galena/cat's whisker type. A picture of the detector is shown below:

[Image: detector7.JPG]
galena/cat's whisker detector

The galena crystal is held in the screw-cup to the left and the cat's whisker (a curly piece of wire) is held in a sort of pin-chuck to the right. In operation, the handle attached to the cat's whisker is carefully slid in and out and/or rotated so that the cat's whisker drags across the surface of the crystal. The crystal is covered in many contact sites that will allow rectification to take place. With careful adjustment the cat's whicker will fall upon one of these sites and a when this happens a detector is formed. Follow this link for more information on Crystal Sets. The audio output from the detector is connected to the headphones via terminals marked 'T' ('T' for 'telephones' as they were know then). Two sets of headphones can be connected in series by making use of a third, unmarked, terminal between the two 'T' terminals. Not that there is no RF decoupling capacitor connected across the audio output as was often seen on other crystal sets. No doubt the designer felt that the headphones themselves have sufficient capacitance for the task. For reception of the 15kW 5XX station on 1600 metres (broadcast from the Marconi works in Chelmsford, England) the 1600m Loading Coil could be plugged in.

http://earlywireless.com/gecophone_junior_picinfo.htm

Now that is HISTORY of early wireless a simple Crystal radio Cheer
HeartflowersJhikpghf

Look into my eyes to see a Paradise of Love

https://www.youtube.com/watch?v=lqtHu0XFal0

https://www.youtube.com/watch?v=wo7PY4vbQLE

https://www.youtube.com/watch?v=LTm9ui-26F0
Quote this message in a reply
piequal3because14
Angel of Love from Heaven
User ID: 1337
01-21-2018 10:30 PM

Posts: 30,264




Post: #13
RE: Electronics Thread
Pasta Lover  Wrote: (01-21-2018 10:24 PM)
I used to have a set of these. They flat out rocked.

[Image: 536405-carver_amazing_ribbon_speakers.jpg]
They have special flat shape.

Look into my eyes to see a Paradise of Love

https://www.youtube.com/watch?v=lqtHu0XFal0

https://www.youtube.com/watch?v=wo7PY4vbQLE

https://www.youtube.com/watch?v=LTm9ui-26F0
Quote this message in a reply
piequal3because14
Angel of Love from Heaven
User ID: 1337
01-21-2018 10:31 PM

Posts: 30,264




Post: #14
RE: Electronics Thread
Pasta Lover  Wrote: (01-21-2018 10:21 PM)
I have a set of these. They are quite lovely.

[Image: DSCF1207adc1.JPG?action=dlattach;topic=8...ttach=3078]
Question is 2 ? or 4 speakers.


Look into my eyes to see a Paradise of Love

https://www.youtube.com/watch?v=lqtHu0XFal0

https://www.youtube.com/watch?v=wo7PY4vbQLE

https://www.youtube.com/watch?v=LTm9ui-26F0
Quote this message in a reply
Monk-1
Registered User
User ID: 1337
01-21-2018 10:31 PM

Posts: 5,687




Post: #15
RE: Electronics Thread
Yeah just don`t come flying to our shores with that. Thinking is banned. Really. For real now. And weapons.
(This post was last modified: 01-21-2018 10:34 PM by Monk-1.) Quote this message in a reply
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