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Full Duty Cycle radios

John Geiger AF5CC All Messages By This Member #268 Has anyone seen a list, or have knowledge, of which Yaesu transceivers are rated for 100% power out for full duty cycle modes like RTTY and FM? ? 73 John AF5CC
Lee Mannchen All Messages By This Member #269 开云体育 I ran my FT-950 almost every day like that for 7 years. Never had a problem. sstv, ezpal, rrty, you name it, I ran it. On 1/28/2025 12:16 PM, John Geiger AF5CC via groups.io wrote: toggle quoted message Show quoted text Has anyone seen a list, or have knowledge, of which Yaesu transceivers are rated for 100% power out for full duty cycle modes like RTTY and FM? ? 73 John AF5CC
John Geiger AF5CC All Messages By This Member #270 开云体育 Thanks for the reply.? That is good to know.? I did see in the FT950 manual that it was advised to run it at 1/3 to 1/2 power if making long digital mode transmissions.??? My FT450AT handled it like that fine for 2 1/2 years, then it didn't. 73 John AF5CC Sent using Zoho Mail ---- On Tue, 28 Jan 2025 11:23:05 -0600 Lee Mannchen <email@...> wrote --- toggle quoted message Show quoted text I ran my FT-950 almost every day like that for 7 years. Never had a problem. sstv, ezpal, rrty, you name it, I ran it. On 1/28/2025 12:16 PM, John Geiger AF5CC via groups.io wrote: Has anyone seen a list, or have knowledge, of which Yaesu transceivers are rated for 100% power out for full duty cycle modes like RTTY and FM? ? 73 John AF5CC
Lee Mannchen All Messages By This Member #271 开云体育 I was driving an AL-1200 so I could not overdrive the amp and got a good clean signal out. All yaesu radios must be carefully adjusted so they don't splatter. Very easy to do with a Yaesu. The newer rigs have the AMC which chokes them down and keeps them from over modulating. On 1/28/2025 12:29 PM, John Geiger AF5CC via groups.io wrote: toggle quoted message Show quoted text Thanks for the reply.? That is good to know.? I did see in the FT950 manual that it was advised to run it at 1/3 to 1/2 power if making long digital mode transmissions.??? My FT450AT handled it like that fine for 2 1/2 years, then it didn't. 73 John AF5CC Sent using Zoho Mail ---- On Tue, 28 Jan 2025 11:23:05 -0600 Lee Mannchen <email@...> wrote --- I ran my FT-950 almost every day like that for 7 years. Never had a problem. sstv, ezpal, rrty, you name it, I ran it. On 1/28/2025 12:16 PM, John Geiger AF5CC via groups.io wrote: Has anyone seen a list, or have knowledge, of which Yaesu transceivers are rated for 100% power out for full duty cycle modes like RTTY and FM? ? 73 John AF5CC
Stiv Ostenberg All Messages By This Member #272 开云体育 Yeah, what is the deal with that?? My FT710 says it supports a 50% duty cycle, but then appears to retract that claim when running FT8, which I thought was almost exactly a 50% duty cycle. ? toggle quoted message Show quoted text From: [email protected] <[email protected]> On Behalf Of John Geiger AF5CC via groups.io Sent: Tuesday, January 28, 2025 9:30 AM To: Yaesu-Amateur-Radio <[email protected]> Subject: Re: [Yaesu-Amateur-Radio] Full Duty Cycle radios ? Thanks for the reply.? That is good to know.? I did see in the FT950 manual that it was advised to run it at 1/3 to 1/2 power if making long digital mode transmissions.??? My FT450AT handled it like that fine for 2 1/2 years, then it didn't. ? 73 John AF5CC ? Sent using Zoho Mail ? ? ? ---- On Tue, 28 Jan 2025 11:23:05 -0600 Lee Mannchen <email@...> wrote --- ? I ran my FT-950 almost every day like that for 7 years. Never had a problem. sstv, ezpal, rrty, you name it, I ran it. On 1/28/2025 12:16 PM, John Geiger AF5CC via groups.io wrote: Has anyone seen a list, or have knowledge, of which Yaesu transceivers are rated for 100% power out for full duty cycle modes like RTTY and FM? ? 73 John AF5CC ? ? ? ?
Larry Patten All Messages By This Member #273 开云体育 The way I look at it is it is not about specs it is about heat. ?That is why I love the temperature meter on the Ftdx101mp. ?I think most of the recent radios from Yaesu have that as part of the meter. ? Just turn on the temperature meter and watch what happens with the temperature of the final. ?Keep that within specs and you will be fine. ?I do the same with my Flex 6400 although in that case I had to add on some software that puts a meter on the screen that shows the temperature of the finals. ?I don’t think ft8 is exactly 50% duty cycle in that the temperature during receive never goes quite back to normal after transmit. ?Additionally you will see a steady rise in the temperature as you continually use ft8. ?I also am very protective of equipment so I never run more that 50% rated output power of the radio and never use an amp. ? K9OQ ? Larry G Patten toggle quoted message Show quoted text On Jan 28, 2025, at 7:10?PM, Stiv Ostenberg <stiv@...> wrote: ? Yeah, what is the deal with that?? My FT710 says it supports a 50% duty cycle, but then appears to retract that claim when running FT8, which I thought was almost exactly a 50% duty cycle. ? From: [email protected] <[email protected]> On Behalf Of John Geiger AF5CC via groups.io Sent: Tuesday, January 28, 2025 9:30 AM To: Yaesu-Amateur-Radio <[email protected]> Subject: Re: [Yaesu-Amateur-Radio] Full Duty Cycle radios ? Thanks for the reply.? That is good to know.? I did see in the FT950 manual that it was advised to run it at 1/3 to 1/2 power if making long digital mode transmissions.??? My FT450AT handled it like that fine for 2 1/2 years, then it didn't. ? 73 John AF5CC ? Sent using Zoho Mail ? ? ? ---- On Tue, 28 Jan 2025 11:23:05 -0600 Lee Mannchen <email@...> wrote --- ? I ran my FT-950 almost every day like that for 7 years. Never had a problem. sstv, ezpal, rrty, you name it, I ran it. On 1/28/2025 12:16 PM, John Geiger AF5CC via groups.io wrote: Has anyone seen a list, or have knowledge, of which Yaesu transceivers are rated for 100% power out for full duty cycle modes like RTTY and FM? ? 73 John AF5CC ? ? ? ?
Stiv Ostenberg All Messages By This Member #275 开云体育 So, how would one know if there was a problem with the finals?? Is there a test to see if they are OK? ? toggle quoted message Show quoted text From: [email protected] <[email protected]> On Behalf Of Larry Patten via groups.io Sent: Tuesday, January 28, 2025 6:00 PM To: [email protected] Cc: [email protected] Subject: Re: [Yaesu-Amateur-Radio] Full Duty Cycle radios ? The way I look at it is it is not about specs it is about heat. ?That is why I love the temperature meter on the Ftdx101mp. ?I think most of the recent radios from Yaesu have that as part of the meter. ? Just turn on the temperature meter and watch what happens with the temperature of the final. ?Keep that within specs and you will be fine. ?I do the same with my Flex 6400 although in that case I had to add on some software that puts a meter on the screen that shows the temperature of the finals. ?I don’t think ft8 is exactly 50% duty cycle in that the temperature during receive never goes quite back to normal after transmit. ?Additionally you will see a steady rise in the temperature as you continually use ft8. ?I also am very protective of equipment so I never run more that 50% rated output power of the radio and never use an amp. ? ? K9OQ ? ? Larry G Patten ? On Jan 28, 2025, at 7:10?PM, Stiv Ostenberg <stiv@...> wrote: ? Yeah, what is the deal with that?? My FT710 says it supports a 50% duty cycle, but then appears to retract that claim when running FT8, which I thought was almost exactly a 50% duty cycle. ? From: [email protected] <[email protected]> On Behalf Of John Geiger AF5CC via groups.io Sent: Tuesday, January 28, 2025 9:30 AM To: Yaesu-Amateur-Radio <[email protected]> Subject: Re: [Yaesu-Amateur-Radio] Full Duty Cycle radios ? Thanks for the reply.? That is good to know.? I did see in the FT950 manual that it was advised to run it at 1/3 to 1/2 power if making long digital mode transmissions.??? My FT450AT handled it like that fine for 2 1/2 years, then it didn't. ? 73 John AF5CC ? Sent using Zoho Mail ? ? ? ---- On Tue, 28 Jan 2025 11:23:05 -0600 Lee Mannchen <email@...> wrote --- ? I ran my FT-950 almost every day like that for 7 years. Never had a problem. sstv, ezpal, rrty, you name it, I ran it. On 1/28/2025 12:16 PM, John Geiger AF5CC via groups.io wrote: Has anyone seen a list, or have knowledge, of which Yaesu transceivers are rated for 100% power out for full duty cycle modes like RTTY and FM? ? 73 John AF5CC ? ? ? ?
Carl Foster - KB7AZ All Messages By This Member #276 I have used an FT-950, FTDX-3000, and FTDX-101D running SSTV, AM, and RTTY at full power with no issues. AM ran with a 25-watt carrier. If I am running a contest, I use an amplifier even if low power (100 or 150 watts) to keep the transceiver cool. The FTDX-101D has a setting to show transmitter temperature. Even running high duty cycles at 100 watts, the internal fan keeps it below 45C. I had an Icom IC-7610 for a while (not any more), and it worked OK for high duty cycle modes. FT-8 is a 43% duty cycle.? ? Carl? KB7AZ?

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