Geoff Roberts Hand Crafted Crystal Radio Parts





Detector Stands and Crystals



PERIKON DETECTOR No1

Perikon Replica Detecctor

This was made for Alan Reeves for his Westinghouse Crystal Receiver which was missing the detector. I mounted the finished detector on a base as I originally intended this to be used with other crystal receivers.I have fitted a Galena and Zincite Crystal to this but many combinations of crystals can be used.

It is essential to make a good electrical contact to the Zincite I used a very thin strip of sheet pewter which is a very soft metal and cushions the contact with the rather delicate Zincite.The whole crystal is held in place with a grub screw.

The Galena is held in place with 'Woods metal' another very soft metal alloy which melts at a lower temperature than Lead and Galena.

The two crystals are held in point contact by a spring loaded shaft and the pressure is adjustable with the Knurled screw.It is possible to rotate the crystals and move up and down and side to side on the crystal surfaces in a similar way to a Catswisker.

The Dark Oak stained box measure 6 inches x 4 inches The size of the detector was a bit of a challenge to make on my old lathe but i really enjoyed it.

Im looking forward to the next one of these projects as I find these devises very interesting. If research had continued on these instead of the thermionic valve we may have had the transistor in the 1920's.and computers by the 30's

Close Up View


Galena Crystal Holder

GALENA CRYSTAL HOLDER with fixing screws, insulators and solder tag also including a small piece of Galena (Lead Sulphide). The holder is ½ inch/12.5mm diameter and 3/8 inch/10mm deep. Suitable for woods metal or grub screw securing of crystal.Larger View   Included Hardware

P/N
01-001
£5.99 Ea.

Catwhisker Crystal Radio Detector

CATSWHISKER DETECTOR with galena crystal. I made this in my workshop from Solid Brass Turned parts and finest Rosewood. The detector has a solid gold wire 'Catswhisker'used to tickle the crystal until you find the best reception. It works great with a little patience. Larger View

P/N
30-001
£50.00 Ea.

Perikon Type Detector No1

PERIKON DETECTOR No1 The description is shown above.

Larger View   Close Up View

P/N
30-002
£100.00

Perikon Type Detector No2

PERIKON DETECTOR No2 The description will be added soon

Larger View

P/N
30-003
£100.00

Vertical Mounted Perikon Replica Detector

VERTICAL MOUNTED PERIKON DETECTOR No1 This detector holds two crystals in point contact in a clear tube. It has a knurled screw on top for fine adjustment of pressure.

Larger View

P/N
30-004
£50.00

Enclosed Tickler Detector

ENCLOSED TICKLER DETECTOR #1

Larger View

P/N
30-005
£ POA

Clapp Eastham Replica Detector

CLAPP EASTHAM TYPE

Larger View

P/N
30-006
£ POA

Coherer No1

COHERER No1

Larger View

P/N
30-007
£ POA

French Style Detector

FRENCH STYLE DETECTOR

Larger View

P/N
30-008
£ POA

Geoff Jam Jar Detector

GEOFF JAM JAR DETECTOR No1

Larger View

P/N
30-009
£ POA

Germanium Tickler Detector

GERMANIUM TICKLER DETECTOR

Larger View

P/N
30-010
£ POA




Crystals


GALENA CRYSTAL Small Crystal approx 1/2 inch x 1/4 inch or 12.5mm x 6mm. Larger view. Please enquire for prices and availability.

P/N
10-014
£x.xx Ea.

Galena Crystal

FOOLS GOLD (Iron Pyrite) Approx 1/2inch x1/2 inch or 12.5mm x 12.5mm Larger view. Please enquire for prices and availability.

P/N
10-015
£x.xx Ea.

Iron Pyrite Cube

IRON PYRITE CUBE Near Perfect Cube. 1/2 x 1/2 x 1/2 or 12.5 sq Larger view. Please enquire for prices and availability.

P/N
10-016
£x.xx Ea.

Peacock Ore

PEACOCK ORE Approx 3/4 x 3/4 or 20 x20 mm Larger view. Please enquire for prices and availability.

P/N
10-017
£x.xx Ea.

Red Zincite

RED ZINCITE Approx 20mm Long Larger view. Please enquire for prices and availability.

P/N
10-018
£x.xx Ea.

Silicon Metal

SILICON METAL Pure Silicon metal element. Size is approx 1/4x1/4x5/16 inches.6mm x 6mm x 8mm. Larger view.

P/N
10-019
£x.xx Ea.

Germanium Metal

GERMANIUM METAL Pure germanium metal crystal.size approx 1/4 x 1/4 x 5/16 or 6mm x 6mm x 8mm. Other sizes available on request Larger view. Please enquire for prices and availability.

P/N
10-020
£x.xx Ea.