[K3CAL] Fwd: K7AGE just uploaded a video

[Jim Tetlow]

Nice find!

Sent from my iPad, 73,
Jim Tetlow
O!!!!!O
k3uga at comcast.net


> On Feb 26, 2015, at 16:21, Chip Dahle <K3AWD at comcast.net> wrote:
> 
> This might be what you are looking for (1N34 substitute)
> 
> http://www.angelfire.com/electronic2/index1/In34a.html
> 
> 
> 
> 
> 
> 
> 
>> On Feb 26, 2015, at 4:02 PM, N3AE wrote:
>> 
>> Probably the hardest part find is the 1N34 diode.  This is a germanium diode, not a silicon diode (difference is in forward voltage drop...0.3 volts vs.7 for a silicon diode).  Makes a difference in the sensitivity of the field strength meter. The 1N34 used to be a common part available at Radio Shack.  Now I think you may have to get it via mail order from any of the electronics housed like DigiKey, JAMECO, etc.
>> 
>> Sounds like a fun (and useful) project.
>> 
>> 
>> From: "Jim Tetlow" <k3uga at comcast.net>
>> To: "k3cal" <k3cal at mailman.qth.net>
>> Sent: Thursday, February 26, 2015 8:04:58 AM
>> Subject: [K3CAL] Fwd: K7AGE just uploaded a video
>> 
>> Sorry, here we go again, this may be a fun project.........
>> 
>> Sent from my iPad, 73,
>> Jim Tetlow
>> O!!!!!O
>> k3uga at comcast.net
>> 
>> 
>> Begin forwarded message:
>> 
>> From: YouTube <noreply at youtube.com>
>> Date: February 25, 2015 at 22:04:37 EST
>> To: Jim Tetlow <jim.de.k3uga at gmail.com>
>> Subject: K7AGE just uploaded a video
>> 
>> K7AGE has uploaded Let's Build A Field Strength Meter I follow Richard's, KB3VZL,...
>> 
>> 
>> K7AGE has uploaded Let's Build A Field Strength Meter
>> 
>> Let's Build A Field Strength Meter
>> 
>> K7AGE
>> I follow Richard's, KB3VZL, February 2015 QST (page 71) article about building a field strength meter into a DVM. He built the circuit to fit inside a Harbor Freight digital volt meter. You can get these free at Harbor Freight if you have the right coupons.
>> 
>> I also use my new ISO-TIP battery powered soldering iron.
>> http://www.iso-tip.com
>> 
>> Three capacitors, two diodes and a pot is all that is needed. Build this on a small perf board and it fits easily inside the meter.
>> 
>> Parts:
>> 0.05 uF Cap
>> 470 pF Cap
>> 0.01 Cap
>> 1N34 Diodes, you need 2
>> 50K trim pot
>> hunk of perf board
>> switch
>> connector for antenna
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>> 
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> 
> Thanks
> 73
> Chip    K3AWD
> 
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