Welcome! Log In Create A New Profile

Advanced

Old Champ

WM6
June 01, 2020 12:28AM
avatar
Does anyone still have schematic of this DIY Metal Mineral detector from year 1969?

Detector was named Treasure Locator TRL-1 and was available for $29.95 as DIY kit.

Curious how they solve Metal Mineral detector circuit using 5 transistors only.





Edited 1 time(s). Last edit at 06/01/2020 12:33AM by WM6.
Subject Author Views Posted

Old Champ

WM6 103 June 01, 2020 12:28AM

Re: Old Champ

dixiedigger57 51 June 02, 2020 06:18AM

BFO's range from clothes to terrible to not so bad.

Monte 44 June 02, 2020 08:34AM

Sorry, wish I could help. The only person I know who might

Monte 55 June 01, 2020 12:01PM

Re: Sorry, wish I could help. The only person I know who might

WM6 42 June 01, 2020 02:36PM

Re: Sorry, wish I could help. The only person I know who might

Druid 41 June 01, 2020 06:20PM

Re: Sorry, wish I could help. The only person I know who might

WM6 40 June 02, 2020 04:55PM

Re: Sorry, wish I could help. The only person I know who might

Druid 38 June 02, 2020 06:55PM

Re: Sorry, wish I could help. The only person I know who might

WM6 39 June 02, 2020 07:31PM

Re: Sorry, wish I could help. The only person I know who might

Druid 39 June 03, 2020 09:17AM

Re: Sorry, wish I could help. The only person I know who might

WM6 42 June 03, 2020 11:37AM



Sorry, only registered users may post in this forum.

Click here to login

Online Users

Guests: 20
Record Number of Users: 13 on January 18, 2018
Record Number of Guests: 302 on March 10, 2018