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Elecraft K2 KAF2 filter alignment – K0EMT's amateur radio blog
https://dbbear.com/radio_blog/index.php/2020/10/18/elecraft-k2-kaf2-filter-alignment/
Consult the Elecraft KAF2 manual. Make sure you have your filter configured for the two stage option. Check jumper W1. It should be open. Also, note that there are two pots on the filter to adjust. Turn the first stage of the KAF2 filter on (AF1). Adjust the R1 pot to peak the output. KAF2 filter first stage tuned
K2_Options – Elecraft
https://elecraft.com/collections/k2_options
Elecraft Hands-On Ham Radio, High-Performance Transceivers and Amplifiers ... Filter 8 products. Sort. KAT2 20W Internal ATU. Regular price $299.95. K2 Audio Filter & Real Time Clock ... KAT2 20W Internal ATU. Regular price $299.95. K2 Audio Filter & Real Time Clock. Regular price $139.95. KBT2 Internal Battery Kit. Regular price $199.95. KBT2 ...
K2 Transceiver Kit – Elecraft
https://elecraft.com/products/k2-the-classic-hf-transceiver-full-kit
The K2 is a full-featured HF transceiver with the options you have come to expect from radios costing over twice as much. Two VFOs with multiple memories, split TX/RX operation, RIT/XIT, full break-in CW, memory keyer, narrow IF crystal filtering, excellent RX dynamic range and IF derived AGC are standard on the K2. Overview Packages Specs
G3VGR's Elecraft K2 Page - QSL.net
https://www.qsl.net/g3vgr/k2.html
The KAF2 Audio Filter and Real Time clock is the last Elecraft option to be fitted to my K2: The K2 with the 4 options installed. The ID plate from WB2ART can be clearly seen: G3VGR giving a talk/demo of the K2 at LEFARS club: Front view of completed K2 #4783 (Dec. 2005) Rear view of completed K2 #4783: Original home-made AF Amplifier PCB.
Measuring The Elecraft K2 SSB TX/RX Audio Response
https://www.qsl.net/kd2bd/ksb2.html
on lower sideband. Due to the K2's frequency mixing scheme, the lower sideband I.F. filter response is the one normally employed during regular SSB operations on the 160, 80, 40, 15, 12, and 10 meter bands. Microphones designed for communication service (those with response peaks around 3000 Hz) may produce
The DSP Filter for the K2 (discontinued) - QRPproject
https://www.qrpproject.de/UK/elecraft_k2-dsp.htm
The KDSP2 provides up tofour user-configurable filters in each mode(CW/SSB/data), complementing the K2's variable-bandwidth crystal filter. CW filter settings include center frequency and bandwidth, with "hard" and "soft" filter algorithmsand bandwidths as narrow as 50 Hz. SSB filters provide programmable low and high cutoff frequencies.
AF1_Compatible Products – Elecraft
https://elecraft.com/collections/af1_compatible-products
2 products. Sort Sort Best Selling Alphabetically, A-Z Alphabetically, Z-A Price, low to high Price, high to low Date, new to old Date, old to new. K2 Transceiver Kit. Regular price. $1,099.95. AF1 Audio Frequency Filter. Regular price. $99.95.
eHam.net
https://www.eham.net/reviews/detail/5470
Great Filter Time Owned: more than 12 months. I built and installed the KDSP2 Filter into my K2 last year. Building the KDPS2 is really a misnomer since the IC Chip and SMD components are preinstalled at Elecraft. I think the filter sounds and works great. I will tell you that it took me a long while to figure it out.
eHam.net
https://www.eham.net/reviews/detail/117
With the CALFIL filter settings set correctly you will have great SSB TX Audio with several mikes including Elecraft, Kenwood, Heil 5 and Yaesu hand mikes.The support from Elecraft staff is first rate and unequaled by any other manufacturer. Despite other well meaning comments i must disagree with the criticism of the internal speaker.
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