kokusai mf 455zl 21h
Kokusai filter repair, Kokusai MF-455-10CK Mechanical Filter repair - February 2016 Chris GM3WOJ This webpage describes my experience of repairing the type of mechanical filter used in the KW2000 series of transceivers There are other articles online, but I could not find any which had detailed photos of the procedure - probably because these articles were written ,JA1VBN's Kokusai Mechanical Filter, Type: Center Frequency: Bandwidth at 6dB: Carrier Frequency (SSB Use) Bandwidth at 60dB Attenuation: Gain per Stage (Gm=4m/Ω) Transmission Loss: Input TerminalMF, Find the best pricing for Bourns MF-S420 by comparing bulk discounts from 14 distributors Octopart is the world's source for MF-S420 availability, pricing, and technical specs and other electronic partsRadio Museum, Radio MuseumTokyo Kokusai MF455 Khz Usb Lsb Mechanical Filter, TOKYO KOKUSAI electric 455 khz usb lsb mechanical filter pair I have a of filters one upper sideband unit, mf-455zl-21h, and lower mf-455zu-21h Perfect for either upgrading a current radio or your home brew project Nos but untested These filters are nos with the original test data sheets for each filter.
ipernity: AN/SPS, Antenna of the AN/SPS-6C radar of preserved destroyer HS Velos D16, (Fletcher Class, ex USS Charrette DD581) AN/SPS-6C was an air-search radar operating in the L-band on 1249 MHz with a peak pulse power of 750 kW, pulse 4 ms/150 pps and a range of 8 ,bhmorris and coCradio) limited, Kokusai Mechanical Filters MF 455-1OCK MF 455-15CK Mosley TA -33 JR E triband 3 element beam TA -31 JR Triband dipole L550 L605 £660 £1320 £1800 £495 £125 £150 £5445 L8250 L495 E990 £1100 Model C3043 RF field indicatorQTHCOM Ham Radio Classified Ads: SEARCH RESULTS, KOKUSAI ELECTRIC MECHANICAL FILTER MF-455ZL-21H (2 available) - $35 each-MURATA CERAMIC FILTERS CFS-455D - $12 CFM-455D - $12 CFR-455C - $12-RCA 3460514-7 - CF 455 KHz, BW 12 KHz, wire leads in & out - $12 Listing #1513148 - Submitted on 11/08/20 by Callsign K3DUA, Modified on 11/16/20 - IP: pool-100-16-173-74bltmmdfiosverizonPE1ABR's entry to NRD, "JRC" YF455EBF and KOKUSAI MF-455-03AZ121: HF circuit leakage around the filters: After almost 100 measurements and the 4th build of the measuring module, the effects of HF leakage around a filter became very clear The effects are ao a too high bottom line and very straight, no curls or strong dips Wait a minute, that's the same as the ,Tokyo Kokusai Electric Co Mechanical filter | eBay, Type MF-455-1OK, NO nCSK3556 Tokyo Kokusai Electric Co Mechanical filter Seller information hifissb 991% Positive Feedback Save this seller See other items Registered as a business seller Item information Condition: Used.
KW2000, 29-Jul-2004: KW with the cover off - no big investigation at this stage, just testing the valv14 out of the 21 valves are below serviceable emission levels and an order has been placed with Triode Electronics in Chicago to replace them The preselector and AF gain knobs have been swapped round at some stage, and there is a cracked mica capacitor in the PA stage - not much to write home ,Kokusai Filter Repair, Apr 30, 2003· Kokusai Filter Repair: Kokusai MF-455-10AZ Mechanical filters, and others of the MF-455 family, have a habit of failing because the foam which supports the filter after an extended time, decomposes into a sticky, gooey mess, which dampens the vibrations of the resonating disks These were used in frDX400, flDX400, KW1000, and HA-350 sets, among ,Filtro 455khz Mf, CNPJ nº 03007331/0001-41 / Av das Nações Unidas, nº 3003, Bonfim, Osasco/SP - CEP 06233-903 - empresa do grupo Mercado LivreMurata cfj455k8 455 KHZ Hochleistungs Keramik Filter für ,, NOS Kokusai Mechanical Filter 455KHz MF-455-ZU-21H w/ Spec Sheet USB Free Ship EUR 18,42 EUR 23,02 Kostenloser VersandKokusai Mechanical Filters as fitted to the KW2000 series ,, A datasheet for the Kokusai MF-455-10CK can be found on the KW Yahoo! Group Files Section Double sideband generator spectrum contains energy in the lower sideband and upper sideband but little or no energy in the carrier (typically 40dB of suppression) The filter is used to remove the unwanted sideband and pass the required sideband.
SolderSmoke Daily News: Switching to a Mechanical Filter ,, Jan 07, 2019· Pete's filter is from the Kokusai Electric Company Part# MF 455 ZL (Date stamped May 1967) "ZL"indicates lower sideband I checked and indeed the passband goes from just above 452 kc ,Mechanical filter, What is claimed is: 1 A mechanical filter comprising an input electromechanical transducer element and an output electro-mechanical transducer element, each of truncated circular cross-section and disposed in predetermined, substantially parallel, spaced relationship, and a coupler element, having a flexural or longitudinal mode resonance characteristic, mechanically cascade-connecting the ,KOKUSAI MECHANICAL FILTER, MF, Sep 2, 2016 - KOKUSAI MECHANICAL FILTER, MF-455-10-CK, AS USED IN KW 2000, NEW OLD STOCK Untested new old stock - very rare to findSolderSmoke Daily News: Switching to a Mechanical Filter ,, Jan 07, 2019· Pete's filter is from the Kokusai Electric Company Part# MF 455 ZL (Date stamped May 1967) "ZL"indicates lower sideband I checked and indeed the passband goes from just above 452 kc up to about 4545 kc This is a 40 meter receiver and SSB on 40 is LSB, so this filter would work perfectly right? Not so fast! Sideband inversion had to be ,Mechanical Filter, Mechanical Filter - MF 455-1OZ 99-0123 Radio part Lafayette Radio & TV Corp; New York NY, build 1965, 1 pictures, United States of America , schematics, tubes.
AudioPathic Distractions | Boutiques eBay, we offer the best in fully tested and guaranteed, new & used vintage audio components including vacuum tubes, capacitors, resistors, transformers, ham radio equipment, literature & diy hardware our inventory is getting massive; check back often!!!Akvaristika, Najraznovrsniji izbor opreme za akvaristiku na jednom mestu Izaberi i poruči onlineKokusai Filter Repair, Apr 30, 2003· Kokusai Filter Repair: Kokusai MF-455-10AZ Mechanical filters, and others of the MF-455 family, have a habit of failing because the foam which supports the filter after an extended time, ,[Kokusai Electric MF, KOKUSAI MF-455ZU-21H Shortwave Filters Radio Description Mf 455zu 21h Kokusai Electric 2 Vintage All pictures show the actual items you will receive Four pages of data sheets were found with these and are included Part number MF 455ZU 21H, from a local ham radio estate Condition they appear to be nos new old stock and are in very good ,NOS Kokusai Mechanical Filter 455KHz MF, Details about NOS Kokusai Mechanical Filter 455KHz MF-455-ZU-21H w/ Spec Sheet USB Free Ship See original listing , Up for sale is a NOS Kokusai Mechanical Filter MF-455-ZU-21H,.
Boatanchors, The KW-2000 employed a 455KHZ mechanical filter made by Kokusai The Kokusai MF-455-10CK filter was built in a small round can and the mechanical flags were suspended in a spongy foam much like packing foam After 40 years this foam turned into a liquid goo This caused the filter elements to fall to the bottom of the canThe development of a 455 kHz filter test and measurement setup, Also some receivers (eg 4x JRC NRD-515) suffered from significant decline in performance (additional 6 to 15 dB attenuation) of the luxury Kokusai mechanical filters caused by decay of the inner foam to a sticky rubbery (IF-damping!) massWhat is the performance before and after a (hopefully not destructive) cleaning and repair turn On this site some of the foregoing can be foundTokyo Kokusai MF455 Khz Usb Lsb Mechanical Filter, TOKYO KOKUSAI electric 455 khz usb lsb mechanical filter pair I have a of filters one upper sideband unit, mf-455zl-21h, and lower mf-455zu-21h Perfect for either upgrading a current radio or your , Global, Sep 17, 2020· delivers digital solutions utilizing Lumada in five sectors including Mobility, Smart Life, Industry, Energy and IT, to increase our customer's social, environmental and economic valueG3ZPS web pages, Kokusai only ever made 2 bandwidths in the can type used in KW gear - 10K suffix (about 21KHz SSB) and 15K suffix for wider SSB (but too narrow for decent AM reception) The biggest enemies of any restoration project (radios, cars, houses!) are ; 1 ) Commitment, 2) Time and 3 ) Workshop facilities and spares to finish the job.
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