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K3S_Filters – Elecraft
https://elecraft.com/collections/k3s_filters
K3S_Filters – Elecraft 11 products Filter Matching for the K3S/K3 - 200 Hz, 500 Hz and 2.7 kHz filter pairs only. $39.95 1kHZ Filter for the K3/K3S (CW/DATA), Kit $149.95 Sold out 2.1 kHZ Filter for the K3/K3S (SSB) $149.95 Sold out KFL3A-2.7 $79.95 2.8 kHz upgrade from the standard 2.7 kHz (New K3S, KRX3A orders only), Installed $139.95
Showing The New Audio Peak Filter of Elecraft K3 - …
https://www.youtube.com/watch?v=cuX099NqGt4
This is an example of how the new Audio Peak Filter firmware addition on Elecraft K3 help. Also you can see how well the Noise Blanker and Noise Filter also ...
Elecraft K3 APF Audio Peaking Filter - YouTube
https://www.youtube.com/watch?v=y5wYkG6SrbE
A demonstration of the newly added APF feature in the Elecraft K3 firmware.
Elecraft K3 Settings - K5ZD
https://k5zd.com/elecraft-k3-settings/
500 Hz InRad 8-pole filter on CW. 2.8 kHz 8-pole filter on SSB (1.8 8-pole when bands crowded, must move IF SHIFT lower for pleasing audio) Use XFIL button to toggle between filters and reset the IF shift, rather than NOR (hold) button. PREamp ON for 15m and up, OFF for other bands . My current settings for other items: AF GAIN Low. AF LIM nor 030
Configuring your K3S and K-Line System – Elecraft
https://elecraft.com/pages/configuring-your-k3ss-and-k-line-system
A 2.7 kHz SSB filter is included standard with each K3S and each KRX3A. On SSB the K3S must transmit through the widest standard SSB filter (either 2.7 or 2.8 kHz). (You may receive on any filter.) Again, K3S radios must have at least a 2.7 or 2.8 kHz SSB filter installed. (2.7 kHz is included with the base K3S.)
K3S Crystal 'Roofing' Filters – Elecraft
https://elecraft.com/pages/k3s-crystal-roofing-filters
In order to achieve the best K3S blocking dynamic range (desense) in the 140 dB+ range, you -must- use a narrow crystal filter (400 Hz, 250 Hz or 200 Hz for closer interfering signal spacing) in front of the DSP.
Elecraft K3 Crystal 'Roofing' Filters - QRZ Now
https://qrznow.com/elecraft-k3-crystal-roofing-filters/
This is why we are offering filters with bandwidths as low as 200 Hz. And yes, these are still “roofing” filters, because they limit exposure (bandwidth), thus protecting later stages (in the K3 case, the IF amp, 2nd mixer, and DSP). 73, Wayne. N6KR. CTO, Elecraft, Inc. There has been a lot of discussion and speculation on the list lately ...
K3S Transceiver – Elecraft
https://elecraft.com/products/k3s-transceiver
In a first for the industry, the K3S’s identical main receiver and subreceiver each feature a high-dynamic-range, down-conversion analog architecture. This allows Elecraft to provide roofing filters with bandwidths as narrow as 200 Hz for both receivers. Up-conversion designs have roofing filters typically 3,000 to 15,000 Hz in width.
K3 Enhancements and Mods and Tech Alerts – Elecraft
https://elecraft.com/pages/k3-enhancements-and-mods-and-tech-alerts
Incorrect VOX operation (VOX 'hangs') and/or low or corrupted TX audio, when using a front panel mic which requires BIAS to be supplied to the mic through the audio pin. (Elecraft MH2, MD2, Proset-K2 with electret elements etc.) Modification involves addition of 1 wire to the rear of the K3 Front Panel board.
K3 FM Filter - K5ND
https://www.k5nd.net/2015/01/k3-fm-filter/
The installation actually went quite well. I pulled out the manuals for the K3 and the KRX3 subreceiver. Pulled off the top cover, removed the KRX3, pulled off the bottom cover, and removed the four filters. Installed the FM filter and reinstalled the other four filters (all 8-pole at 2.8 kHz, 1 kHz, 500 Hz, and 250 Hz).
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