[Elecraft] KX1 power output increase -- free mod kit available
Some KX1s have slightly lower transmitter output than others. When using a 14V supply, the output may be as low as 2.5 to 3 watts across all bands instead of the expected 3 to 4 watts. When using the internal battery the output maybe as low as 0.75 to 1 watt instead of he expected 1 to 1.5 watts. Some builders have noticed this effect only after installing the KXB3080 option (30/80 meter module). The low-pass filter module supplied with the KXB3080 has slightly different characteristics from the original, which is necessary to obtain coverage of all four bands. If you think your KX1's output is on the low side, for whatever reason, you can order our model #KX1PWRMODKT at no charge. It's listed at the bottom of our Parts and Mod Kits page: http://www.elecraft.com/order_form_parts.htm The mod kit provides two resistors and instructions, and the change is easy to make. If you have your own stash of resistors, you can just download the application note at: http://www.elecraft.com/manual/ E740099%20KX1%20Application%20Note%20Rev%20A.pdf NOTE: We don't recommend making the change if your KX1 already puts out 4 watts or more on some bands. While it's generally safe to operate the KX1 at 5 watts, the design was optimized at the 4-watt level to provide plenty of safety margin in terms of RFI, current drain, and heat sinking via the top cover. 73, Wayne N6KR --- 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
RE: [Elecraft] KX1 power output increase -- free mod kit available
Since someone already hollered privately and said, That URL doesn't work! Note that most people will have to splice it together again! The long URL gets broken in a lot of e-mail readers. An alternative TinyURL that will take you to the same Elecraft document to download/view the Application Note is: http://tinyurl.com/rzp42 Ron AC7AC ___ 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
Re: [Elecraft] KX1 power output increase -- free mod kit available
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 I have not opened mine up yet, but in looking at this I found a typo in the App Note it says Locate resistor R30 on the bottom of the board between trimmer pot R30 should that be R4? Randy Rathbun NV0U [EMAIL PROTECTED] K2#1981, kx1 #1318, ARS #895, QRPARCI #10776, FP#1292, KCQRP #1 On Apr 5, 2006, at 6:07PM, wayne burdick wrote: Some KX1s have slightly lower transmitter output than others. When using a 14V supply, the output may be as low as 2.5 to 3 watts across all bands instead of the expected 3 to 4 watts. When using the internal battery the output maybe as low as 0.75 to 1 watt instead of he expected 1 to 1.5 watts. Some builders have noticed this effect only after installing the KXB3080 option (30/80 meter module). The low-pass filter module supplied with the KXB3080 has slightly different characteristics from the original, which is necessary to obtain coverage of all four bands. If you think your KX1's output is on the low side, for whatever reason, you can order our model #KX1PWRMODKT at no charge. It's listed at the bottom of our Parts and Mod Kits page: http://www.elecraft.com/order_form_parts.htm The mod kit provides two resistors and instructions, and the change is easy to make. If you have your own stash of resistors, you can just download the application note at: http://www.elecraft.com/manual/E740099%20KX1%20Application%20Note %20Rev%20A.pdf NOTE: We don't recommend making the change if your KX1 already puts out 4 watts or more on some bands. While it's generally safe to operate the KX1 at 5 watts, the design was optimized at the 4-watt level to provide plenty of safety margin in terms of RFI, current drain, and heat sinking via the top cover. 73, Wayne N6KR --- 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 -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.1 (Darwin) iD8DBQFENF+t6zTmfegBFIERAoTPAJ9sVAzPivtXZvMEgRruiHSTBY0LfQCfTxxl hyJfTVd8WGOBpYS7nt9Iwgg= =HbQV -END PGP SIGNATURE- ___ 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
RE: [Elecraft] KX1 power output increase -- free mod kit available
You are absolutely right. It is R4, not R30! Ron -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Randy Rathbun NV0U Sent: Wednesday, April 05, 2006 5:24 PM To: wayne burdick Cc: Elecraft Reflector Subject: Re: [Elecraft] KX1 power output increase -- free mod kit available -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 I have not opened mine up yet, but in looking at this I found a typo in the App Note it says Locate resistor R30 on the bottom of the board between trimmer pot R30 should that be R4? Randy Rathbun NV0U [EMAIL PROTECTED] K2#1981, kx1 #1318, ARS #895, QRPARCI #10776, FP#1292, KCQRP #1 ___ 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
