Now, that solution shows the power of the group! All this piker could do was look up a 200V diode or suggest connecting two in series.
When the NE-51 lights you know you have exceeded the diode reverse voltage! And it's time to add a resistance pad. Mike Scott AE6WA Tarzana, CA Elecraft KX1 40M Inverted V 20M Dipole -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Al Gulseth Sent: Monday, May 22, 2006 5:44 PM To: elecraft@mailman.qth.net; [EMAIL PROTECTED] Subject: Re: [Elecraft] Elecraft RF Probe Funny you should mention that -- just in the past few days I was browsing through an old [1968 edition] ARRL "Hints and Kinks". In an article titled "Diode Protection for the Heath R.F. Probe" the author suggested adding a NE-51 neon lamp across the diode (a solution he came up with after frying "three or four" 1N34s). This should work for the Elecraft probe as the schematic shown in H&K for the Heath probe is virtually identical to the schematic in the K1 manual (the only difference is a .005 vs. .01 cap for the input coupling and the polarity of the diode). 73 es GL, Al On Mon May 22 2006 06:53 pm, [EMAIL PROTECTED] wrote: > Date: Mon, 22 May 2006 17:22:23 -0500 > From: "Stan Rife" <[EMAIL PROTECTED]> > Subject: [Elecraft] Elecraft RF Probe > To: <elecraft@mailman.qth.net> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="US-ASCII" > > I forgot to mention that I put a 1N4148 in and it seems to have > taken it out too. > > > I put too much voltage on my poor probe. Is there a heavier diode > that will take a little more voltage, say around 70v, that I can replace > the 1N31A with? > > > Stan Rife > W5EWA > Houston, TX > K2 S/N 4216 _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
