I went this route and updated (2) K3's with the E850235 boards. The boards are $20 verses the kit with some resistors spec. to 1% is $15.
73 de KE4WY Jim -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill W4ZV Sent: Friday, March 06, 2009 10:39 AM To: elecraft@mailman.qth.net Subject: [Elecraft] I/O mod kit REMIOUPGD (P/N E850235) W0MU Mike Fatchett wrote: > > For those wanting TTL outputs on the I/O board (Mike incorrectly stated > E850237), you may now replace your old board with a new one. $15.00 ($20 > is correct) plus shipping. This is an alternative to soldering the 2.2k > resistors on the old board. > For the record, I'm posting this response from Lyle KK7P to me (his comments preceded by ###): Which of the following mods involving the KIO3 does this affect? http://www.elecraft.com/K3/k3_app_notes.htm ###I'm not sure I understand the question, but I'll try and answer anyway. ###I assume by E850237 you mean the KIO3 Remote (aka Digital) IO board that is included in the REMIOUPGD mod kit. I believe the correct part number for this is E850235. **K3 AF OutPut Mod Kit* <http://www.elecraft.com/K3/mods/AF_Output_Mod_Rev_C.pdf> ###No impact, not part of the digital IO board. **Improving the Immunity of the Rear-Panel RS232 and Audio Connectors to RF <http://www.elecraft.com/K3/mods/ELECRAFT_Application_Note_Improving_the_Imm unity_of_the_Rear-Panel_KIO3_RS232_and_Audio_Connectors_to_RF.pdf> ###Ground return inductor mod on the RS232 port only. ###The RFI mods list some optional inductor bypasses. The optional ones are not done on the new board; they are still optional based on your shack, environment and station system design. **K3 AF Mod kit <http://www.elecraft.com/K3/mods/K3_AF_Stage_Upgrade_Instructions_Rev_B.pdf> ###No impact, not part of the digital IO board. **K3 Negative ALC and Ext Band Data Pull-up Mods <http://www.elecraft.com/K3/mods/K3ALCMod_Rev_B.pdf> ###Does the digital IO board portion. The RF board cuts portion *must* still be done. To summarize: 1. The board involved is the KIO3 Remote IO (aka "Digital") Board, P/N E850235 and is available for $20 plus shipping as REMIOUPGD on this page: http://www.elecraft.com/order_form_parts.htm#K3%20Parts 2. Installing this board can be done in lieu of grounding the RS232 Ground Choke on the Remote I/O Module as shown in Figure 5 of the mod "Improving the Immunity of the Rear-Panel RS232 and Audio Connectors to RF". The other parts of this mod on page 3, affecting the KIO3 Audio I/O Module, must still be performed. 3. Installing this board can be done in lieu of pages 3-4 of the mod "K3 Negative ALC and Ext Band Data Pull-up Mods". However, cutting the two traces on the RF board (under the bottom front cover) must still be performed as shown on page 2 of the mod instructions. I hope this clears up any confusion. Hopefully I got everything right (please correct me if I didn't Lyle). 73, Bill W4ZV -- View this message in context: http://n2.nabble.com/New-I-O-mod-kit-E850237-tp2312165p2436405.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
