开云体育

FT-817 compatibility

Keith VE7GDH All Messages By This Member #115643 Mike (call sign?) wrote… I'm wondering if I use manual tuning, by keying the radio on packet, AM or CW and not going to lower power, what would be the danger to tune into a mismatch until the tuner matches the rig to antenna? If you use AM for tuning, the carrier is reduced to 1.5 W or less no matter what power level you have the radio set for. It gives you a reduced power signal for tuning without having to press any buttons except the mode button. -- 73 Keith VE7GDH
Michael Davis All Messages By This Member #115647 Thanks Keith. The 1.5 watts on AM sounds relatively safe. Not sure how much of the 5 watts max might cause the finals damage. I know there have been reported damage, but I don’t know the actual cause. 73 Mike WA1MAD
Keith VE7GDH All Messages By This Member #115648 Mike WA1MAD wrote… The 1.5 watts on AM sounds relatively safe. Not sure how much of the 5 watts max might cause the finals damage. In the past, I used an Elecraft T1 auto-tuner and the FT-817 survived that. I recently picked up a manual QRP Z-match tuner with an absorptive bridge, so the radio never sees a match worse than 2:1 while tuning. The radio should be pretty happy with that. -- 73 Keith VE7GDH
David Wilcox K8WPE All Messages By This Member #115649 开云体育 In my experience of hearing tales of woe (not personal experience) damage to the FT 817 was caused by trying to use a tuner to an unknown antenna for too long of a time. ?High SWR seems to be the culprit and caused a lot of failures back in the day. ?Yaesu did some protection in the ND model. ?Mine sits there hoping I will use it again someday. It is a fun radio in spite of the many layers of button presses and small difficult to read screen. ?I sent mine to W4RT back in the day and had all the upgrades. ?What a machine when it was all one could buy in a small package covering all bands. ? Be the REASON someone smiles today. Dave K8WPE toggle quoted message Show quoted text On Jan 4, 2025, at 10:40?PM, Michael Davis via groups.io <maddmd818@...> wrote: ? Thanks Keith. The 1.5 watts on AM sounds relatively safe. Not sure how much of the 5 watts max might cause the finals damage. I know there have been reported damage, but I don’t know the actual cause. 73 Mike WA1MAD
Michael Davis All Messages By This Member #115650 开云体育 Thanks Dave, mine is an original non ND. I recently bought a new finals board, just in case. If you’ve seen the external display, it’s a nice option, but does add some clunkyness to the compact unit. I’m also waiting for the CAT bluetooth adapter, to see if that’s more to my liking, although I may run into CAT rate issues once again. 73 Mike Davis WA1MAD toggle quoted message Show quoted text On Jan 5, 2025, at 8:03?AM, David Wilcox K8WPE via groups.io <Djwilcox01@...> wrote: ?In my experience of hearing tales of woe (not personal experience) damage to the FT 817 was caused by trying to use a tuner to an unknown antenna for too long of a time. ?High SWR seems to be the culprit and caused a lot of failures back in the day. ?Yaesu did some protection in the ND model. ?Mine sits there hoping I will use it again someday. It is a fun radio in spite of the many layers of button presses and small difficult to read screen. ?I sent mine to W4RT back in the day and had all the upgrades. ?What a machine when it was all one could buy in a small package covering all bands. ? Be the REASON someone smiles today. Dave K8WPE On Jan 4, 2025, at 10:40?PM, Michael Davis via groups.io <maddmd818@...> wrote: ? Thanks Keith. The 1.5 watts on AM sounds relatively safe. Not sure how much of the 5 watts max might cause the finals damage. I know there have been reported damage, but I don’t know the actual cause. 73 Mike WA1MAD

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