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GET /hyperkitty/api/list/[email protected]/email/NXOX6HCKKIIITTL55VHAR3F6GZQWIY5L/
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/NXOX6HCKKIIITTL55VHAR3F6GZQWIY5L/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "NXOX6HCKKIIITTL55VHAR3F6GZQWIY5L", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/GXY22NGUKDQKJQMFMSDHPONBULWNHX5G/", "sender": { "address": "maccody (a) att.net", "mailman_id": "b6473a44d40d4c91b7f8bb74bef3b879", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/b6473a44d40d4c91b7f8bb74bef3b879/emails/" }, "sender_name": "Mac A. Cody", "subject": "Re: [amsat-bb] Potential 23cm FM transmitter", "date": "2018-02-01T01:49:04Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/RVOVN4BCL6X6HMEKCHMLTSP6WFHRBBC2/", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Wish you had mentioned that it was in the January issue (long with a \npage number,\ntoo) in your original posting.\n\nMac\n\nOn 01/30/2018 11:14 PM, Brad Brooks wrote:\n> Mac, the arrival I was referencing started on page 20 of the Jan 2018 issue—a number of pages back from the region you quoted from.\n>\n> The links at the end of the article point to the following site of Bas PE1JPD, who has a nice single board FM unit that has potential. Looks like he offers his kits for about 158 Euros+shipping: http://www.pe1jpd.nl/index.php/23cm_nbfm/\n>\n> 73 Brad WF7T\n>\n> On Jan 30, 2018, 7:47 PM -0600, Mac A. Cody <[email protected]>, wrote:\n>> This is my third attempt to post this message. It seems that the AMSAT-BB\n>> blocks messages with JPEG attachments. Below is a Google translation of\n>> the article on the 23cm transceiver inDKARS magazine.\n>>\n>> 73,\n>>\n>> Mac Cody / AE5PH\n>>\n>> VHF-UHF-SHF News\n>> This month provided by Hans van Alphen, PAØEHG\n>>\n>> Nice new transistor for 23 cm PA\n>>\n>> Since the beginning of this year NXP has a nice power LDMOS transistor\n>> in the range for the 23 cm band.\n>> The transistor type: MRFE8VP13350 assumes pre-matched adaptation and is\n>> designed for industrial, scientific and medical applications. The\n>> transistor is capable of supplying 350 watts in the frequency range 700\n>> to 1300 MHz, which is also ideal for our 23 cm band.\n>> With a typical LDMOS supply voltage of 50 volts, approximately 10 to 14\n>> amps is required to get the 350 watt output with a control of 8 watts, a\n>> comfortable 16 dB gain.\n>>\n>> Italian Technology Broadcast offers 490 Euro ex VAT a module for sale\n>> consisting of a built pallet with all parts on it and a copper base of\n>> 9.5 mm thick that needs to be mounted on a cooling plate.\n>>\n>> Further information and how to order this unit can be found via:\n>> http://vhelectronics.sk/index.php/en/rf-modules-and-boxes/alx-350-detail\n>>\n>> For those for whom this power is not yet sufficient, NXP has also\n>> announced a bigger brother, the MRF13750H, which can deliver an output\n>> of no less than 750 Watts in the band from 700 MHz up to and including\n>> 1300 MHz. With almost 20 dB gain, approximately 10 Watts is sufficient\n>> to send the transistor. This transistor will probably soon be on the\n>> market and possibly also as a complete one\n>> power pallets become available. Data from this transistor can be found at:\n>> https://www.nxp.com/docs/en/data-sheet/PRF13750H.pdf\n>>\n>> 70 cm EME with only 10 watts\n>> On 2 December 2017, the M6EBQ succeeded in making a 70cm EME QSO with\n>> DL7APV with only 10 Watt output. The connection in WSJT was made with 10\n>> W output from a Yeasu FT857 and as antenna a DG7YBN 70-17m 17 element Yagi.\n>>\n>> The antenna used to design by DG7YBN uses a flat folded dipole with\n>> which very favorable characteristics can be achieved.\n>>\n>> The antenna has the property that the side lobes at the back are very\n>> well suppressed and thus a very good front-rear ratio for the length of\n>> this antenna.\n>>\n>> With 3.63 meters in length and a gain of 17.3 dBi and a front-back ratio\n>> of no less than 38 dB, this is also a very suitable antenna for\n>> contests. Of course, therefore, there is also little noise picked up and\n>> the antenna is also very suitable for moonbounce.\n>>\n>> Information on how to make this antenna can be found at:\n>> http://dg7ybn.de/432MHz/GTV70_17m.htm\n>>\n>>\n>> On 01/26/2018 01:43 PM, Brad Brooks wrote:\n>>> For those who receive the DKARS magazine, there is a very interesting article. The transceiver described is for ATV, but it looks like like it will tune to the AO-92 uplink frequency. Seems to put out 400mw FM out. I am not able to take time now to review deeper (stealing away from work) but I look forward to parsing through the schematic/links this weekend. I am forwarding this notice for anyone who will be able to get there sooner. I think there is some potential here, and I would like to know other’ opinions.\n>>>\n>>> Www.dkars.nl\n>>>\n>>> 73 Brad WF7T\n>>> Nashville TN EM66\n>>> _______________________________________________\n>>> Sent [email protected]. AMSAT-NA makes this open forum available\n>>> to all interested persons worldwide without requiring membership. Opinions expressed\n>>> are solely those of the author, and do not reflect the official views of AMSAT-NA.\n>>> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n>>> Subscription settings:http://www.amsat.org/mailman/listinfo/amsat-bb\n>>\n>> _______________________________________________\n>> Sent via [email protected]. AMSAT-NA makes this open forum available\n>> to all interested persons worldwide without requiring membership. Opinions expressed\n>> are solely those of the author, and do not reflect the official views of AMSAT-NA.\n>> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions expressed\n> are solely those of the author, and do not reflect the official views of AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n\n\n", "attachments": [] }