437 MHz - Revision history

M0YDH at 20:03, 16 November 2019

2019-11-16T20:03:14Z

M0YDH at 20:01, 16 November 2019

2019-11-16T20:01:20Z

M0YDH at 20:01, 16 November 2019

2019-11-16T20:01:05Z

M0YDH at 20:00, 16 November 2019

2019-11-16T20:00:21Z

M0YDH: 70CM AMPLIFIERS OPENING TEXT

2019-11-16T19:24:00Z

70CM AMPLIFIERS OPENING TEXT

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In CQ-TV 265, Clive G3GJA details how he got along with a amplifier kits from Bert PE1RKI for 70cm and 2m using Mitsubishi modules. These superb kits are subject to Bert's lead times for delivery.

The same modules form the main element of the [https://www.minikits.com.au/electronic-kits/rf-amplifiers/rf-high-power/RA-UHF-Amplifier Mini-kits UHF amplifier] which turns the 10mW from a Portsdown into 11W clean DATV. A Pentium P4 heatsink and fan needs to be found to mount the module and PCB to its surface. The low pass filter kit from 437MHz duty is available from elsewhere on the same website. These typically arrive in 3 weeks.

Use a paper template with a rectangular aperture when applying the horrible heat sink compound. This ensures you get the dimensions for the compound shown in the Mitsubishi application note. You can use a plastic straight spreader to smear the compound then remove the template.

The Nokia TTRX Dolphin amplifiers appear from time to time at rallies and on Ebay. [https://forum.batc.org.uk/viewtopic.php?t=5214 BATC members have modifed these].
Other websites that deal with these are e.g.

[http://g4fev.atspace.com/dolphinpa.htm G4FEV]
[https://www.qsl.net/g3wzt/Nokia%20Dolphin%20modsV2.html G3WZT]
[http://www.m0dts.co.uk/index.php?item=68 Rob M0DTS]

← Older revision		Revision as of 20:03, 16 November 2019
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	In CQ-TV 265, Clive G3GJA details how he got along with a amplifier kits from Bert PE1RKI for 70cm and 2m using Mitsubishi modules. These superb kits are subject to Bert's lead times for delivery.		In CQ-TV 265, Clive G3GJA details how he got along with a amplifier kits from Bert PE1RKI for 70cm and 2m using Mitsubishi modules. These superb kits are subject to Bert's lead times for delivery.

−	The same modules form the main element of the [https://www.minikits.com.au/electronic-kits/rf-amplifiers/rf-high-power/RA-UHF-Amplifier Mini-kits UHF amplifier] which turns the 10mW from a Portsdown into 11W clean DATV. A Pentium P4 heatsink and fan needs to be found to mount the module and PCB to its surface. The low pass filter kit ~~from~~ 437MHz duty is available from elsewhere on the same website. These typically arrive in 3 weeks.	+	The same modules form the main element of the [https://www.minikits.com.au/electronic-kits/rf-amplifiers/rf-high-power/RA-UHF-Amplifier Mini-kits UHF amplifier] which turns the 10mW from a Portsdown into 11W clean DATV. A Pentium P4 heatsink and fan needs to be found to mount the module and PCB to its surface. The low pass filter kit for 437MHz duty is available from elsewhere on the same website. These typically arrive in 3 weeks.

@@ Line 2: / Line 2: @@
 The same modules form the main element of the [https://www.minikits.com.au/electronic-kits/rf-amplifiers/rf-high-power/RA-UHF-Amplifier Mini-kits UHF amplifier] which turns the 10mW from a Portsdown into 11W clean DATV. A Pentium P4 heatsink and fan needs to be found to mount the module and PCB to its surface. The low pass filter kit from 437MHz duty is available from elsewhere on the same website. These typically arrive in 3 weeks.
-[[File:Mini-kits_amp_pcb_on_Pentium_P4_style_heatsink_and_fan.jpg]]
+[[File:Mini-kits_amp_pcb_on_Pentium_P4_style_heatsink_and_fan.jpg|400px]]
 Use a paper template with a rectangular aperture when applying the horrible heat sink compound. This ensures you get the dimensions for the compound shown in the Mitsubishi application note. You can use a plastic straight spreader to smear the compound then remove the template.