MCS2000 - Revision history

W3AXL: /* VHF Preamplifier Conversion */

2020-04-19T16:27:42Z

VHF Preamplifier Conversion

← Older revision		Revision as of 16:27, 19 April 2020
Line 6:		Line 6:
	====VHF Preamplifier Conversion====		====VHF Preamplifier Conversion====
	Originally, the MCS2000 VHF RX section was offered in two flavors, "normal" and "preamplifier." Those wishing to switch to the higher-gain (and possibly more sensitive) preamplifier version need only to make a few small component changes to the receiver board. The following table and figures are pulled from the MCS2000 VHF detailed service manual.		Originally, the MCS2000 VHF RX section was offered in two flavors, "normal" and "preamplifier." Those wishing to switch to the higher-gain (and possibly more sensitive) preamplifier version need only to make a few small component changes to the receiver board. The following table and figures are pulled from the MCS2000 VHF detailed service manual.
			{\|
			\|:
			[[File:Mcs2000-preamp-board-mods.png\|720px]]
			\|\|
			\|:
	{\| class="wikitable"		{\| class="wikitable"
	!'''Component'''\|\|'''Value'''		!'''Component'''\|\|'''Value'''
Line 31:		Line 36:
	\|R3420\|\|0Ω		\|R3420\|\|0Ω
	\|}		\|}
			\|}
	~~[[File:Mcs2000-preamp-board-mods.png~~\|~~720px]]~~

W3AXL at 16:22, 19 April 2020

2020-04-19T16:22:58Z

← Older revision		Revision as of 16:22, 19 April 2020
Line 4:		Line 4:
	====Sensitivity Issues====		====Sensitivity Issues====
	If you notice poor sensitivity, noisy RX, or other receive issues, try opening the radio and tightening the screws holding the boards to the chassis. In some cases the boards will loosen to the point where they do not make good contact with the metal body, reducing the RFI shielding ability and increasing noise in the receiver.		If you notice poor sensitivity, noisy RX, or other receive issues, try opening the radio and tightening the screws holding the boards to the chassis. In some cases the boards will loosen to the point where they do not make good contact with the metal body, reducing the RFI shielding ability and increasing noise in the receiver.
			====VHF Preamplifier Conversion====
			Originally, the MCS2000 VHF RX section was offered in two flavors, "normal" and "preamplifier." Those wishing to switch to the higher-gain (and possibly more sensitive) preamplifier version need only to make a few small component changes to the receiver board. The following table and figures are pulled from the MCS2000 VHF detailed service manual.
			{\| class="wikitable"
			!'''Component'''\|\|'''Value'''
			\|-
			\|colspan="2" style="text-align:center;font-size:12px;"\|Remove
			\|-
			\|L3405\|\|39nH
			\|-
			\|C3309\|\|8.2pF
			\|-
			\|colspan="2" style="text-align:center;font-size:12px;"\|Add
			\|-
			\|C3310\|\|220pF
			\|-
			\|R3357\|\|43Ω
			\|-
			\|R3359\|\|10Ω
			\|-
			\|R3361\|\|20Ω
			\|-
			\|R3405\|\|1500Ω
			\|-
			\|R3407\|\|0Ω
			\|-
			\|R3420\|\|0Ω
			\|}

			[[File:Mcs2000-preamp-board-mods.png\|720px]]

W3AXL at 23:54, 28 March 2018

2018-03-28T23:54:36Z

← Older revision		Revision as of 23:54, 28 March 2018
Line 1:		Line 1:
	The MCS2000 is a single-band analog-only mobile radio, colloquially part of the [[Jedi]] series of radios.		The MCS2000 is a single-band analog-only mobile radio, colloquially part of the [[Jedi]] series of radios.

			===Hardware===
			====Sensitivity Issues====
			If you notice poor sensitivity, noisy RX, or other receive issues, try opening the radio and tightening the screws holding the boards to the chassis. In some cases the boards will loosen to the point where they do not make good contact with the metal body, reducing the RFI shielding ability and increasing noise in the receiver.

W3AXL: Created page with "The MCS2000 is a single-band analog-only mobile radio, colloquially part of the Jedi series of radios."

2018-03-28T23:24:34Z

Created page with "The MCS2000 is a single-band analog-only mobile radio, colloquially part of the Jedi series of radios."

New page

The MCS2000 is a single-band analog-only mobile radio, colloquially part of the [[Jedi]] series of radios.