FCC regulations - Revision history

FrankRahman at 21:41, 29 October 2026

2026-10-29T21:41:14Z

← Older revision		Revision as of 21:41, 29 October 2026
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	(Infoworld, October 18, 1982)		(Infoworld, October 18, 1982)
			</blockquote>

			==Early Machine Issues (Not FCC compliant)==
			<blockquote>
			Some rural readers have noted that they can't run their Kaypros and their TVs at the same time. So, in recognition of marital bliss week-and to avoid putting old Kaypros out to pasture prematurely-I have a few suggestions.

			The oldest (and noisiest) Kaypros have an AC cord that is permanently connected the back panel (not a plug and socket). These units don't have an AC line filter (the AC wires go directly to the on/off switch).

			If you have one of these units, the first thing you need to do is purchase an AC line filter. You can get one that mounts on the inside of the cabinet, then you connect very short leads from the power cord to the filter. Or, even better, you can purchase a new cord and filter combination (the filter has a power socket built in).

			Now, check the inside edge of your cabinet lid. There should be rectangles of shiny bare aluminum which match up with shiny bare rectangles on the main cabinet (they line up with the screw holes). These rectangles provide electrical contact between the cover and the main cabinet. If you don't have the rectangles, get a good file and make some shiny spots around the screw holes.

			These two modifications should cure most of the problem. (You remembered to replace the lid, right?) If you are still having problems then you need to check out the radiation from the keyboard and printer cables.

			Take an AM/PM pocket radio and place it near the Kaypro. Tune around on both bands noting any strong signals (might be raspy). Any signals generated by the Kaypro will disappear when you turn the power off.

			Move the radio around the Kaypro and see where the signals are the loudest. If your cover is doing its job, the cabinet will be quiet and the signals will be loudest around the keyboard, the keyboard cable, and the printer or modem cable.

			You can purchase shielded RS232 and parallel interface cables (or just get shielded multiconductor wire and add your own shielded connectors). Or you can keep the serial and parallel cables disconnected during prime time.

			The keyboard is another matter. It's hard to do much with the Kaypro when the keyboard is unplugged and I haven't heard of any shielded phone cables that you could use for the keyboard.

			However, you can try bypassing the the keyboard interface. Solder a .01 disc ceramic capacitor (25V or higher rating) between ground and pins 1, 2, and 4 on J3. J3 pin 3 is grounded and you can see the ground plane running to it on top of the circuit board. (Look for J3 stenciled on the top of the circuit board, right above where the keyboard plugs in.) The pin diagram and numbers are stenciled right behind the pins themselves.

			Gently scrape the green solder mask from the ground plane (large copper area) so you'll have a space to solder the capacitor leads. Keep the capacitor leads very short.

			When you get done with all this, you should have the quietest Kaypro on the block. If that isn't quiet enough then to heck with marital bliss.<br>
			(Micro Cornucopia, Dec 1983)
	</blockquote>		</blockquote>

FrankRahman: /* A note about Filter Caps */

2026-01-18T00:24:07Z

A note about Filter Caps

← Older revision		Revision as of 00:24, 18 January 2026
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	They can be replaced with brand new RIFA caps or hard outer plastic filter caps of the type removed (X2 or Y2) except as noted on my [[Power Supplies]] webpage. Both should be replaced in another 20 years.		They can be replaced with brand new RIFA caps or hard outer plastic filter caps of the type removed (X2 or Y2) except as noted on my [[Power Supplies]] webpage. Both should be replaced in another 20 years.


			Mr Carlson's Lab did a very good video showing an example of needing filter capacitors on switch mode power supplies like the ones used in the Kaypro machines. You can find it [https://www.youtube.com/watch?v=bRi6_-iikvg here].

	==Case mounted RFI filters==		==Case mounted RFI filters==

FrankRahman: /* FCC Compliance */

2025-10-05T16:55:42Z

FCC Compliance

← Older revision		Revision as of 16:55, 5 October 2025
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	\| CUL7XL81-015 \|\| K4 (81-015) \|\| June 28, 1984		\| CUL7XL81-015 \|\| K4 (81-015) \|\| June 28, 1984
	\|-		\|-
	\| CUL7XLKP2 \|\| All K2, K2X and [[Kaypro 1]]\|\| July 18, 1984		\| CUL7XLKP2 \|\| All K2, K2X, New 2, and [[Kaypro 1]]\|\| July 18, 1984
	\|-		\|-
	\| CUL7XLROBIE \|\| [[Robie]] \|\| July 18, 1984		\| CUL7XLROBIE \|\| [[Robie]] \|\| July 18, 1984

FrankRahman: /* FCC Compliance */

2025-06-16T00:13:28Z

FCC Compliance

← Older revision		Revision as of 00:13, 16 June 2025
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	[[File:K4 fcc label.jpg]]		[[File:K4 fcc label.jpg]]
	\|\|		\|\|
			\|-
			\|
			[[File:286 fcc label.jpg\|400px]]
	\|}		\|}
	I have not seen an FCC sticker on a Kaypro 10 or 2000.		I have not seen an FCC sticker on a Kaypro 10 or 2000.

	I have not been able to find on the FCC website the ID CUL7XLPC10. These appear on some [[Kaypro PC\| Kaypro PCs]].		I have not been able to find on the FCC website the ID CUL7XLPC10. These appear on some [[Kaypro PC\| Kaypro PCs]].

FrankRahman: /* FCC Compliance */

2025-06-15T23:20:02Z

FCC Compliance

← Older revision		Revision as of 23:20, 15 June 2025
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	\| CUL7XLKP1A \|\| [[Kaypro Micro 1]] \|\| Apr 18, 1988		\| CUL7XLKP1A \|\| [[Kaypro Micro 1]] \|\| Apr 18, 1988
	\|-		\|-
	\| CUL7XL286-16 \|\| 286 ~~16?~~ \|\| Jul 25, 1988		\| CUL7XL286-16 \|\| 286 (81-068) \|\| Jul 25, 1988
	\|-		\|-
	\| CUL7XL286I-16 \|\| 286i 16? \|\| Jul 26, 1988		\| CUL7XL286I-16 \|\| 286i 16? \|\| Jul 26, 1988

FrankRahman: /* FCC Compliance */

2025-06-14T13:00:42Z

FCC Compliance

← Older revision		Revision as of 13:00, 14 June 2025
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	I would suspect that in September they began putting them on in the factory.		I would suspect that in September they began putting them on in the factory.

			The FCC ID registry shows that R Johnson is the contact at Kaypro for all of the FCC IDs. It is likely that this is Roland Johnson.

	{\| class="wikitable"		{\| class="wikitable"

FrankRahman: /* FCC Compliance */

2025-06-14T12:56:27Z

FCC Compliance

← Older revision		Revision as of 12:56, 14 June 2025
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	! ID !! Product !! Date Issued		! ID !! Product !! Date Issued
	\|-		\|-
	\| CUL7XL81-003 \|\| ~~KII~~ (81-003) \|\| Dec 13, 1983		\| CUL7XL81-003 \|\| [[Kaypro II (81-003)]] \|\| Dec 13, 1983
	\|-		\|-
	\| CUL7XL81-004 \|\| K4 (81-004) \|\| Jan 4, 1984		\| CUL7XL81-004 \|\| [[Kaypro 4 (81-004)]] \|\| Jan 4, 1984
	\|-		\|-
	\| CUL7XL81-015 \|\| K4 (81-015) \|\| June 28, 1984		\| CUL7XL81-015 \|\| K4 (81-015) \|\| June 28, 1984
	\|-		\|-
	\| CUL7XLKP2 \|\| All K2, K2X and K1\|\| July 18, 1984		\| CUL7XLKP2 \|\| All K2, K2X and [[Kaypro 1]]\|\| July 18, 1984
	\|-		\|-
	\| CUL7XLROBIE \|\| Robie \|\| July 18, 1984		\| CUL7XLROBIE \|\| [[Robie]] \|\| July 18, 1984
	\|-		\|-
	\| CUL7XLKP4 \|\| K4? \|\| Aug 1, 1984		\| CUL7XLKP4 \|\| K4? \|\| Aug 1, 1984
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	\| CUL7XLK286 \|\| 286? \|\| July 2, 1985		\| CUL7XLK286 \|\| 286? \|\| July 2, 1985
	\|-		\|-
	\| CUL7XLK10 \|\| ~~K10~~ \|\| July 7, 1985		\| CUL7XLK10 \|\| [[Kaypro 10]] \|\| July 7, 1985
	\|-		\|-
	\| CUL7XLK16 \|\| ~~K16~~ \|\| Jan 13, 1986		\| CUL7XLK16 \|\| [[Kaypro 16]] \|\| Jan 13, 1986
	\|-		\|-
	\| CUL7XLKMD \|\| ? \|\| March 19, 1986		\| CUL7XLKMD \|\| ? \|\| March 19, 1986
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	\| CUL7XLK386 \|\| 386? \|\| Sep 2, 1987		\| CUL7XLK386 \|\| 386? \|\| Sep 2, 1987
	\|-		\|-
	\| CUL7XLK2000PLUS \|\| 2000+ \|\| Sep 25, 1987		\| CUL7XLK2000PLUS \|\| [[Kaypro 2000#Kaypro_2000+\|Kaypro_2000+]] \|\| Sep 25, 1987
	\|-		\|-
	\| CUL7XLEXT5.25 \|\| External 5 1/4 Drive? \|\| Oct 8, 1987		\| CUL7XLEXT5.25 \|\| External 5 1/4 Drive? \|\| Oct 8, 1987
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	\| CUL7XLK286I \|\| 286i? \|\| Dec 18, 1987		\| CUL7XLK286I \|\| 286i? \|\| Dec 18, 1987
	\|-		\|-
	\| CUL7XLKP1A \|\| Micro 1 \|\| Apr 18, 1988		\| CUL7XLKP1A \|\| [[Kaypro Micro 1]] \|\| Apr 18, 1988
	\|-		\|-
	\| CUL7XL286-16 \|\| 286 16? \|\| Jul 25, 1988		\| CUL7XL286-16 \|\| 286 16? \|\| Jul 25, 1988
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	\| CUL7XLKC2 \|\| KC2 \|\| Oct 24, 1989		\| CUL7XLKC2 \|\| KC2 \|\| Oct 24, 1989
	\|-		\|-
	\| CUL7XLKC1 \|\| KC1 \|\| Dec 13, 1989		\| CUL7XLKC1 \|\| [[Kaypro KC1]] \|\| Dec 13, 1989
	\|-		\|-
	\| CUL7XLKPHF \|\| ? \|\| Dec 13, 1989		\| CUL7XLKPHF \|\| ? \|\| Dec 13, 1989
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	\|}		\|}
	I have not seen an FCC sticker on a Kaypro 10 or 2000.		I have not seen an FCC sticker on a Kaypro 10 or 2000.

			I have not been able to find on the FCC website the ID CUL7XLPC10. These appear on some [[Kaypro PC\| Kaypro PCs]].

FrankRahman: /* FCC Compliance */

2025-06-14T00:10:24Z

FCC Compliance

← Older revision		Revision as of 00:10, 14 June 2025
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	I would suspect that in September they began putting them on in the factory.		I would suspect that in September they began putting them on in the factory.

	~~They would get FCC compliance and the II, 2, 2X, and 4 would bear these stickers.~~
	{\| class="wikitable"		{\| class="wikitable"
	\|+ FCC IDs Issued to Kaypro		\|+ FCC IDs Issued to Kaypro
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	\| CUL7XLKPHF \|\| ? \|\| Dec 13, 1989		\| CUL7XLKPHF \|\| ? \|\| Dec 13, 1989
	\|}		\|}

			They would get FCC compliance and the II, 2, 2X, and 4 would bear these stickers.

	{\|		{\|
	\|-		\|-
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	\|\|		\|\|
	\|}		\|}
	I have not seen an FCC sticker on a Kaypro 10.		I have not seen an FCC sticker on a Kaypro 10 or 2000.

FrankRahman: /* FCC Compliance */

2025-06-14T00:08:43Z

FCC Compliance

@@ Line 50: / Line 50: @@
 I would suspect that in September they began putting them on in the factory.
-Later they would get FCC compliance and the II, 2, 2X, and 4 would bear these stickers.
+They would get FCC compliance and the II, 2, 2X, and 4 would bear these stickers.
 {|
 |-
@@ Line 62: / Line 125: @@
   ||
 |}
-I have not seen an FCC sticker on a Kaypro 10 so they may not have done the required tesing.
+I have not seen an FCC sticker on a Kaypro 10.

FrankRahman: /* Case mounted RFI filters */

2025-06-13T22:08:54Z

Case mounted RFI filters

← Older revision		Revision as of 22:08, 13 June 2025
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	\|}		\|}

	If you still have interference with other devices after replacing the Filter Caps on the power the filter plug is the next item to replace.		If you still have interference with other devices after replacing the Filter Caps on the power supply the filter plug is the next item to replace.

	==FCC Compliance==		==FCC Compliance==