[Elecraft] KPA500 Failure
-- An update on my KPA500 failure -- I extracted the amplifier/LPF assembly from the case and examined the two units: - Power FETs and all components *appear* to be OK - *LPF Module Rev D* bd appears to be what failed. The SM component positioned between C97, C110 and C111 *MAY* be C96 - hard to identify after cleaning the white vapor-deposited 'stuff' from the PCA using acetone solvent. There was what appeared to be a "tombstone-positioned" '*something*' sitting on a pad in the damaged area that I can not identify. I have not been able to locate a schematic or PCA picture for this LPF assembly to identify the missing component. If someone could provide a link to the Rev D LPF assy, I would appreciate it very much. 73 and TU to all who have, so-far, provided helpful suggestions. I am now waiting to hear what Elecraft's Service Department has to say about the failure info and picture I sent to them today. Dick/w7wkr __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] For Sale: Single Owner K3S, P3-SVGA-TXMON, KPOD
I am selling my single owner loaded, dual receiver K3S/100. This is a genuine K3S, not an upgraded K3. It comes from a non-smoking home and is in excellent condition. Pictures available upon request. Includes the following: - K3S/100 #113xx includes the following installed options: - KAT3A, ATU for K3S - KTCX03-1, K3 TCXO 1 ppm - KBPF3A General-Coverage RX Filter Module - KDVR3, Digital Voice Recorder - KRX3A, K3 2nd RX Module - KFL3A-2.8_2.7sw, 2.8 for 2.7 khz swap (x2) Filters in Main Receiver: - 6 kHz, 8 pole AM/ESSB filter (Inrad #710L) - 2.8 kHz 8 pole SSB filter - 2.1 kHz, 8 pole SSB filter (Inrad #709L) - 500 Hz, 8 pole CW filter (Inrad #728L) - 250 Hz, 8 pole CW filter (Inrad #708L) Filters in Sub Receiver: - 2.8 kHz 8 pole SSB filter - 2.1 kHz, 8 pole SSB filter (Inrad #709L) - 500 Hz, 8 pole CW filter (Inrad #728L) - 250 Hz, 8 pole CW filter (Inrad #708L) Includes MH2, Electret Hand Microphone Includes all of the latest firmware: MCU 05.67 FPF 01.26 DSP1 02.88 DSP2 02.88 DVR 01.03 K3S Price: $3,990 which includes me paying 50% of the cost for shipping and insurance to the lower 48 states. Also for sale: P3, Panadapter for K3, #46XX, which includes the following options: - P3SVGA, P3 Video/FFT Adapter - P3TXMON, Transmit Monitor Option for P3 - DCHF-2000, Coupler, 1.8-54 MHz, 1-2000 W P3/SVGA/TX Mon Price: $900 which includes me paying 50% of the cost for shipping and insurance to the US lower 48 states. K-Pod and flat cable for K3 in like new condition, with new KPOD Aux cable. $325.00, which includes me paying 100% of the cost for shipping and insurance to the lower 48 states. Please contact me off list at AA4VT dot Dave at gmail dot com -- Thank you! David Needham, AA4VT __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] KPA-500 Failure
Hello Rick (NK7I) and Andy (K3WYC) - Tnx replies "Message: 17 Date: Wed, 24 Apr 2024 14:11:28 + From: Andy Durbin To: "elecraft@mailman.qth.net" Subject: [Elecraft] KPA-500 Failure Message-ID: < dm4pr10mb6791e0db00b79830385f5cd28c...@dm4pr10mb6791.namprd10.prod.outlook.com > Content-Type: text/plain; charset="iso-8859-1" "With the OPER light GREEN and slowly increasing the RF drive level to the amp, there is a point where an internal relay 'click' can be heard, the 50-watt LED on the top row of LEDs turns red and the FAULT light turns red." All the KPA500 LED are single color. The 50 W LED is either lit green or not lit. Did it appear to be red because of light leakage from the FAULT LED? Some quite detailed discussion of KPA500 failure modes on the groups.io forum: https://groups.io/g/KPA500/topics 73, Andy, k3wyc " IF I remember correctly, the entire top row of LEDs flashed red in color when the failure happened. After removing the top cover, the PA assy is visible but there appears to be no easy way access it due to a large bolt connecting the round transformer to the bottom plate. Will have to access the home-builder manual to figure out how to inspect the PA assembly. TU for the reply -- Dick/w7wkr __ 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 Message delivered to arch...@mail-archive.com
