[Lowfer] Lowfer KE

Tue Nov 24 11:00:54 EST 2020

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 > Davis______________________________________________________________Lowfer mailing listHome: > http://mailman.qth.net/mailman/listinfo/lowferHelp: http://mailman.qth.net/mmfaq.htmPost: > mailto:Lowfer at mailman.qth.netPost must be less than 50KB total for message plus attachment!This > list hosted by: http://www.qsl.netPlease help support this email list: > http://www.qsl.net/donate.html______________________________________________________________Lowfer > mailing listHome: http://mailman.qth.net/mailman/listinfo/lowferHelp: > http://mailman.qth.net/mmfaq.htmPost: mailto:Lowfer at mailman.qth.netPost must be less than 50KB > total for message plus attachment!This list hosted by: http://www.qsl.netPlease help support this > email list: > http://www.qsl.net/donate.html______________________________________________________________Lowfer > mailing listHome: http://mailman.qth.net/mailman/listinfo/lowferHelp: > http://mailman.qth.net/mmfaq.htmPost: mailto:Lowfer at mailman.qth.netPost must be less than 50KB > total for message plus attachment!This list hosted by: http://www.qsl.netPlease help support this > email list: > http://www.qsl.net/donate.html______________________________________________________________Lowfer > mailing listHome: http://mailman.qth.net/mailman/listinfo/lowferHelp: > http://mailman.qth.net/mmfaq.htmPost: mailto:Lowfer at mailman.qth.netPost must be less than 50KB > total for message plus attachment!This list hosted by: http://www.qsl.netPlease help support this > email list: > http://www.qsl.net/donate.html______________________________________________________________Lowfer > mailing listHome: http://mailman.qth.net/mailman/listinfo/lowferHelp: > http://mailman.qth.net/mmfaq.htmPost: mailto:Lowfer at mailman.qth.netPost must be less than 50KB > total for message plus attachment!This list hosted by: http://www.qsl.netPlease help support this > email list: > http://www.qsl.net/donate.html______________________________________________________________Lowfer > mailing listHome: http://mailman.qth.net/mailman/listinfo/lowferHelp: > http://mailman.qth.net/mmfaq.htmPost: mailto:Lowfer at mailman.qth.netPost must be less than 50KB > total for message plus attachment!This list hosted by: http://www.qsl.netPlease help support this > email list: http://www.qsl.net/donate.html> ______________________________________________________________> Lowfer mailing list> Home: http://mailman.qth.net/mailman/listinfo/lowfer> Help: http://mailman.qth.net/mmfaq.htm> Post: mailto:Lowfer at mailman.qth.net> Post must be less than 50KB total for message plus attachment!>> This list hosted by: http://www.qsl.net> Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________Lowfer mailing listHome: http://mailman.qth.net/mailman/listinfo/lowferHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:Lowfer at mailman.qth.netPost must be less than 50KB total for message plus attachment!This list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html