kw2000 mechanical filter repair


Kokusai Mechanical Filters as fitted to the KW2000 series ...

Kokusai Mechanical Filters as fitted to the KW2000 series of transceivers (including the KW202/204 and Vespa) Back to Radio Page. This relates my experience with the repair/refurbishment of the Kokusai mechanical filters. I have owned a KW2000 and two KW2000A's over the years and have repaired filters in these and a KW2000B belonging to a ...

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are correctly placed in respect to the mechanical filter pass- band, i.e. about 350 c/s at the maximum from the beginning of the flat part of the filter characteristic, then there should be an overall speech frequency response of approximately 300 c/s to 2-9 kc/s as the 2-1 kc/s nominal Kokusai filter has in

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Kokusai Mechanical Filters as fitted to the KW2000 series ...

19 Kokusai Mechanical Filters as fitted to the KW2000 series of transceivers (including the KW202/204 and Vespa) Back to Radio Page. This relates my experience with the repair/refurbishment of the Kokusai mechanical filters. I have owned a KW2000 and two KW2000A's over the years and have repaired filters in these and a KW2000B belonging to a ...

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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 ...

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Early KW2000 Transceivers - G3ZPS web pages

In 2018 I changed the mechanical filter (which had quite a high loss of at least 20dB) - my quick fix was to use a filter fitted with a Murata CFJ455K. This is a bit wider and the overall shape is not quite as good but it has restored TX and RX gain. I'll have the old one apart in the near future. Early KW2000 PSU

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G3ZPS web pages

The basic radio architecture is the same - Dual conversion, broadband 2.955 to 3.155MHz first IF, 455kHz final IF, Kokusai Mechanical filter (instead of Collins), 200kHz band segments, 6146 output tubes, KW also added 160m, IRT, VOX and the turned aluminium knobs were a nice touch.

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Repair Crystal Filter? | Page 2 | QRZ Forums

K9STH Ham Member QRZ Page. A number of the Japanese mechanical filters were filled with some type of foam-like material that, over time, dissolved into a "gooey" mess. Repairing those filters required removal of the cover and carefully removing all of the "goo" from the inside of the filter. After doing so, the filters usually started working fine.

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GM3WOJ contents page - QSL.net

Repairing a Kokusai MF-455-10CK 455kHz mechanical filter - as used in the KW2000 series transceivers. February 2016 Log-search - ClubLog - online logs for GM3WOJ, GM2V, GS2MP, GM7V, ZL1CT, ZL1V etc.. All logs are also on ARRL 'Logbook of the World'

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Boatanchors

The filter method was selected for these radios based partly on the Collins design. 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.

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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 Terminal

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1.9-Liter TDI Engine with Pump Injection

A mechanical fuel pump sucks the fuel out of the fuel tank through the fuel filter and pumps it along the supply line in the cylinder head to the pump/injectors. Fuel Cooler – Cools the returning fuel to prevent excessively hot fuel from being routed back to the fuel tank. The fuel that is not required for injection is

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The R-390A Frequently Asked Questions Page

Repair procedure. Remove the faulty filter and salvage its mica capacitor. You will notice that the end caps are not identical. The lower cap, which is on the driven end of the filter, has a pinched-off copper tube in the centre. Start by trimming off the pinched end and clearing the hole with a …

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KW2000 Transceiver - Tibblestone

KW2000 Transceiver . I've been using this rig since I bought it in 1974. Even then, it wasn't exactly in it's first flush of youth. It was purchased second-hand from an amateur in Birmingham for £100 having been spotted in an advert in the "Radcomm" (the RSGB Bulletin as was).

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KW2000 - M0KGK

10-Jan-2005: The attempt to fix up the old filter met with failure - here is the solution, a replacement Collins 455KHz mechanical filter which is compact enough to fit in the existing can. This is available from Inrad, and is reasonably priced although the impedance is a little low for the KW2000.

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Diagnostic Fault Codes For Cummins Engines

1 Diagnostic Fault Codes For Cummins Engines Applies to Engine Models QSB T2, QSC T2, QSL T2, QSM11, QSX15, QSK19, QSK23, QST30, QSK45/60/78 …

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