[Lowfer] Lowfer KE

jrusgrove at comcast.net jrusgrove at comcast.net
Tue Nov 24 13:46:46 EST 2020 

Kasey

You're welcome. Look for package to arrive on Friday.

Jay W1VD


----- Original Message ----- 
From: "KA4SEY" <ka4sey at gmail.com>
To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands" <lowfer at mailman.qth.net>
Sent: Tuesday, November 24, 2020 11:00 AM
Subject: Re: [Lowfer] Lowfer KE


> Jay, No those parts should be enough. Thanks for sending them!KaseySent from my Verizon, Samsung 
> Galaxy smartphone
> -------- Original message --------From: jrusgrove at comcast.net Date: 11/24/20  10:33 AM 
> (GMT-05:00) To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands" 
> <lowfer at mailman.qth.net> Subject: Re: [Lowfer] Lowfer KE KaseyPackage going out today includes 27 
> pF and all parts to make a 0-200 mA rf ammeter. Do you need anything else before I pack it 
> up?Jay----- Original Message ----- From: "KA4SEY" <ka4sey at gmail.com>To: "Discussion of the Lowfer 
> (US, European, & UK) and MedFer bands" <lowfer at mailman.qth.net>Sent: Tuesday, November 24, 2020 
> 9:22 AMSubject: Re: [Lowfer] Lowfer KE> Yes, the PO box is good.KaseySent from my Verizon, Samsung 
> Galaxy smartphone> -------- Original message --------From: jrusgrove at comcast.net Date: 11/24/20 
> 9:17 AM (GMT-05:00) > To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands" 
> <lowfer at mailman.qth.net> > Subject: Re: [Lowfer] Lowfer KE KaseyIs your address good on QRZ.com? 
> Jay W1VD----- Original > Message -----From: KA4SEY <ka4sey at gmail.com>Reply-To: Discussion of the 
> Lowfer (US, European, & > UK) and MedFer bands <lowfer at mailman.qth.net>To: Discussion of the 
> Lowfer (US, European, & UK) and > MedFer bands <lowfer at mailman.qth.net>Sent: 11/23/2020 8:13:23 
> AMSubject: Re: [Lowfer] Lowfer > 
> KE________________________________________________________________________________Jay,If you would 
>  > mind, I think all the trouble I've got with the transmitter it would definitely help to have 
> those > parts. I'm sure I can build that meter no problem. KE will be off the air for a few days 
> because > I'm having issues with the chips so I can be working in that while the parts ship. 
> Thanks > againKaseySent from my Verizon, Samsung Galaxy smartphone-------- Original 
> message --------From: > jrusgrove at comcast.net Date: 11/23/20 6:03 AM (GMT-05:00) To: "Discussion 
> of the Lowfer (US, > European, & UK) and MedFer bands" <lowfer at mailman.qth.net> Subject: Re: 
> [Lowfer] Lowfer KE > KaseyUnfortunately, the low range RF ammeter is no longer in the meter box 
> ... I must have already > given it away. The next bigger one I have is 1.5 amp full scale ... 
> which wouldn't be suitable. > These meters are highly non linear ... the first mark up on the 
> scale is 0.5 amp so there's no > chance you could see enough of an indication to work with.I do 
> have the 27 pF silver mica caps and > some parts for a homebrew rf ammeter if you need them.Jay 
> W1VD ----- Original Message -----From: > KA4SEY <ka4sey at gmail.com>Reply-To: Discussion of the 
> Lowfer (US, European, & UK) and MedFer bands > <lowfer at mailman.qth.net>To: Discussion of the 
> Lowfer (US, European, & UK) and MedFer bands > <lowfer at mailman.qth.net>Sent: 11/22/2020 9:33:30 
> AMSubject: Re: [Lowfer] Lowfer KE_______ > 
> _________________________________________________________________________Yea if you wouldn't mind, 
>  > I really appreciate that. I believe you said you had the ammeter as well? If you dont mind I 
> think > it could use it now that I've thought about it. It should really help me the most. For any 
> other > information please let me know. Thanks againKaseySent from my Verizon, Samsung Galaxy > 
> smartphone-------- Original message --------From: jrusgrove at comcast.net Date: 11/22/20 7:13 AM > 
> (GMT-05:00) To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands" > 
> <lowfer at mailman.qth.net> Subject: Re: [Lowfer] Lowfer KE KaseyCan drop a couple 27 pF silver mica 
>  > caps in the mail ... along with the resistors. Just say the word.Jay W1VD----- Original > 
> Message -----From: J D <listread at lwca.org>Reply-To: Discussion of the Lowfer (US, European, & UK) 
>  > and MedFer bands <lowfer at mailman.qth.net>To: <lowfer at mailman.qth.net>Sent: 11/22/2020 2:26:24 > 
> AMSubject: Re: [Lowfer] Lowfer KE___________________ > 
> _____________________________________________________________Kasey, it would appear from your > 
> schematic that a few components may be missing, thereby preventing your oscillator from being as > 
> stable as it needs to be. This same situation is found in a commercially made sorta-kit rig for 22 
>  > meters, and beacons using it there can often be identified by their tendency to wander or even > 
> outright jump around in frequency from day to day.A Pierce oscillator needs capacitance from both 
>  > legs of the crystal to ground as part of a phase shift network. There is stray capacitance > 
> present, of course, without which it would not oscillate at all; but that is neither of sufficient 
>  > magnitude nor stability to ensure reliable oscillation at the design frequency of the crystal. A 
>  > good starting value for capacitors for a typical 3 MHz parallel resonant crystal would be 27 pF 
>  > each.In addition, there needs to be a series resistor between pin 10 and the crystal. It serves 
>  > three functions that each a ffect frequency stability to a certain extent: it isolates the 
> crystal > somewhat from the complex impedance of the gate output, it limits current and thereby 
> power > dissipation in the crystal, and it is part of the phase delay network. As a rough first > 
> approximation, I'd suggest 1 K, maybe as high as 2.2 K.Finally, the shunt resistance across the > 
> crystal could be a little higher in value for 3 MHz operation, such as 3.3 M to 4.7 M. It's not > 
> terribly critical, but it is preferable to operate it with as high a value as will allow for > 
> reliable startup. Lowering the operating Q of the crystal with a low parallel resistance could > 
> allow a crystal to jump too easily between primary resonance and any secondary resonance modes it 
>  > may have.These comments are some basic rule of thumb guidance. For more detailed treatment of > 
> Pierce oscillators implemented with logic gates, I believe Crystek still offers this > 
> article:https://www.crystek.com/documents/appnotes/pierce-gateintroduction.pdfJo hn > 
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