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FT-817 and D-104
Mike Jenkins
I got a good deal on an old D-104 at a hamfest this weekend. The
D104 is the 3-wire version without the amplifier. Can I connect this directly to the FT-817 or do I need some kind of circuitry to match the impedance between the rigs and the microphone? Would it be easier to purchase a heil MC-4 element and insert this into the D-104 head? 73 de K4MNJ |
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Re: FT-817 and D-104
In a message dated 7/13/03 9:11:38 PM Eastern Daylight Time,
k4mnj@... writes: << Would it be easier to purchase a heil MC-4 element and insert this into the D-104 head? >> Mike, I don't know much about the FT-817 but I did do a lot of reading on the MIC. Also on QRP-L some time ago there was a big discussion about it. It's really best for AM use. I have one here with the amp and when it was on an older FT-901 DM my audio reports were not as good as the stock MIC. I think they sell a MIC made by Yaesu that has an apm built in. IMHO I would keep the FT rig matched. Bob AF2Q |
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Re: Tape Measure Dipole
rudeparts
--- In FT817@..., Gerry Wheeler KG4NBB <gwheelerx@q...>
wrote: On Sun, 2003-07-13 at 08:31, rudeparts wrote:thoughtRupert, G6HVY and steel tape measure dipoleCan you elaborate on your tape measure dipole? I've had that myself -- variable length, and already accurately measured! Anyphotos? --I bought a couple of 5m long steel tape measures from Maplin (three quid each - that's around $5) and silver soldered pigtails to the steel thumb tags at the ends. I thought this would make a handy portable dipole, as all I would have to do is attach the tape measure cases to trees or other nearby objects using bungees or cable ties, and hoped it would resonate at 20m -- other bands being usable via my Z11. I haven't been able to try it for transmission on HF yet -- soon, Igor, soon -- but I did pop out and test everything the other day on Hampstead Heath, at least as far as I could. I hooked the aerial up to two branches of a tree, pulled the tape measures out to their fullest extension and ran it into the back of the FT-817 via ten metres of RG-58; no tuner. The ends of the dipole were around 2m off the ground, and the middle was around 50cm. Not ideal. I was rather surprised to find it hit 1.3:1 on Six at full extension and with no tuner, but even more surprised to have a LZ3 come back to me when I answered his CQ. I may have babbled a bit... From what I've read, the steel used in these tape measures is quite resistive, brittle and difficult to work with, which is why I decided to leave the tape itself intact and just connect to the end bit. But for six quid per self-packing dipole, I reckon it's worth a go -- and not only does the aerial tidy itself away after you've used it, but you can measure stuff with it at other times. Photos? Sure. I'll do some this week... but really, there's nothing much to see except my lousy soldering. Next weekend I'm away, but the weekend after I may revisit the Heath and take some pictures of the dipole in action. Rupert, G6HVY and (counter)poised for HF action |
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Re: Tape Measure Dipole
Dave Edwards
Well, perhaps it was vice-versa...who cares??
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...Dave ----- Original Message -----
From: prcradio To: FT817@... Sent: Sunday, July 13, 2003 3:11 PM Subject: [FT817] Re: Tape Measure Dipole If they got the idea from Collins then why did Collins buy Hy-Gain tape dipoles for the KWM-2 portable set ups? Mike --- In FT817@..., "Dave Edwards" <kd2e@c...> wrote: > HyGain made that gadget for YEARS....And I think perhaps they got the idea from Collins!! > ...Dave > ----- Original Message ----- > From: Gerry Wheeler KG4NBB > To: FT-817 > Sent: Sunday, July 13, 2003 8:41 AM > Subject: Re: [FT817] Tape Measure Dipole > > > On Sun, 2003-07-13 at 08:31, rudeparts wrote: > > Rupert, G6HVY and steel tape measure dipole > > Can you elaborate on your tape measure dipole? I've had that thought > myself -- variable length, and already accurately measured! Any photos? > -- > Gerry Wheeler KG4NBB > Naples, FL > N26.28 W081.76 > > > Yahoo! Groups Sponsor > ADVERTISEMENT > > > > > To unsubscribe from this group, send an email to: > FT817-unsubscribe@... and for a great FAQ ( Frequently Asked Questions ) see > Some really good technical info at: > Please note that your messages and files sent to this group may appear anywhere on the Internet or in print without notice or compensation. > > > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. > > > Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: FT817-unsubscribe@... and for a great FAQ ( Frequently Asked Questions ) see Some really good technical info at: Please note that your messages and files sent to this group may appear anywhere on the Internet or in print without notice or compensation. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: Tape Measure Dipole
prcradio
If they got the idea from Collins then why did Collins buy Hy-Gain
tape dipoles for the KWM-2 portable set ups? Mike --- In FT817@..., "Dave Edwards" <kd2e@c...> wrote: HyGain made that gadget for YEARS....And I think perhaps they gotthe idea from Collins!! ...Davethought myself -- variable length, and already accurately measured! Anyphotos? --Frequently Asked Questions ) see Some really good technical info at: Please note that your messages and files sent to this group mayappear anywhere on the Internet or in print without notice or compensation. Service. |
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Re: Battery charging...
Rudy Marcelletti, K8SWD
Nope--mine works fine. Battery Tender charger. The charger will go into float when the rig is trickle charging, however, if you set the rig to use its higher charge rate then the charger will remain in the second stage. I just did that last night. I had 15 minutes left of charge on the rig and shut it off and the charger immediately jumped to float, indicating the battery in my go-box was full charged.
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I use a Rigrunner strip (5 outlet) rubberbanded to a 7 AH SLA and power every thing from that. The first outlet on the Rigrunner strip is for the charger, then the next one goes to the battery, then the remaing ones go to the rig, amp, tuner, clear speech dsp, etc. Rudy Marcelletti, K8SWD ----- Original Message -----
From: rudeparts To: FT817@... Sent: Sunday, July 13, 2003 8:31 AM Subject: [FT817] Battery charging... No, nothing to do with solar cells! I have a 7AH Yuasa SLA battery and a three-stage AC charger for it. It all works fine, and will be part of my HF backpack when the UK authorities give us no-coders full access later this month (we hope!). In the past, I've always float-charged such batteries while using them to power various bits of equipment. However, with the FT-817 the three stage charger doesn't always go into the third stage - I suspect because the Yaesu continues to trickle charge the internal NiMHs and the extra current fools the charger into thinking the main battery still needs second-stage charging. Is this right? I thought the change between stages in lead acid battery charging were marked by voltage, not current, so I'm not sure my initial idea is correct. And if it is, is there an elegant way around the problem? It can't be good for the SLA for it to be stuck in second-stage charging, I don't want to disconnect the charger and leave the Yaesu connected (if I forget, that'll discharge the SLA over time to past its safe point), and I don't want to be faffing around removing and replacing the internal NiMHs. Rupert, G6HVY and steel tape measure dipole Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: FT817-unsubscribe@... and for a great FAQ ( Frequently Asked Questions ) see Some really good technical info at: Please note that your messages and files sent to this group may appear anywhere on the Internet or in print without notice or compensation. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: Tape Measure Dipole
Dave Edwards
HyGain made that gadget for YEARS....And I think perhaps they got the idea from Collins!!
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...Dave ----- Original Message -----
From: Gerry Wheeler KG4NBB To: FT-817 Sent: Sunday, July 13, 2003 8:41 AM Subject: Re: [FT817] Tape Measure Dipole On Sun, 2003-07-13 at 08:31, rudeparts wrote: > Rupert, G6HVY and steel tape measure dipole Can you elaborate on your tape measure dipole? I've had that thought myself -- variable length, and already accurately measured! Any photos? -- Gerry Wheeler KG4NBB Naples, FL N26.28 W081.76 Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: FT817-unsubscribe@... and for a great FAQ ( Frequently Asked Questions ) see Some really good technical info at: Please note that your messages and files sent to this group may appear anywhere on the Internet or in print without notice or compensation. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: Tape Measure Dipole
Gerry Wheeler KG4NBB
On Sun, 2003-07-13 at 08:31, rudeparts wrote:
Rupert, G6HVY and steel tape measure dipoleCan you elaborate on your tape measure dipole? I've had that thought myself -- variable length, and already accurately measured! Any photos? -- Gerry Wheeler KG4NBB Naples, FL N26.28 W081.76 |
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Battery charging...
rudeparts
No, nothing to do with solar cells!
I have a 7AH Yuasa SLA battery and a three-stage AC charger for it. It all works fine, and will be part of my HF backpack when the UK authorities give us no-coders full access later this month (we hope!). In the past, I've always float-charged such batteries while using them to power various bits of equipment. However, with the FT-817 the three stage charger doesn't always go into the third stage - I suspect because the Yaesu continues to trickle charge the internal NiMHs and the extra current fools the charger into thinking the main battery still needs second-stage charging. Is this right? I thought the change between stages in lead acid battery charging were marked by voltage, not current, so I'm not sure my initial idea is correct. And if it is, is there an elegant way around the problem? It can't be good for the SLA for it to be stuck in second-stage charging, I don't want to disconnect the charger and leave the Yaesu connected (if I forget, that'll discharge the SLA over time to past its safe point), and I don't want to be faffing around removing and replacing the internal NiMHs. Rupert, G6HVY and steel tape measure dipole |
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Re: Anyone Besides Yaesu Replace Finals?
Dave Campbell
Hi Mike, I agree with what your saying but, do you think
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owners of other model radios are not capable of "user-error" I have not heard of any other radio (Yaesu or otherwise) with this sort of problem. Dave VE3ZZY ----- Original Message -----
From: "Mike Richter" <m.richter@...> To: <FT817@...> Sent: Saturday, July 12, 2003 4:23 AM Subject: [FT817] Re: Anyone Besides Yaesu Replace Finals? Because the user could have contributed to the problem as wellQuestions ) see Some really good technical info at: Please note that your messages and files sent to this group may appearanywhere on the Internet or in print without notice or compensation.
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Re: Anyone Besides Yaesu Replace Finals?
George
Mike, Can you get that in writing?
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Geo W7LFD |-----Original Message-----
|From: Mike Richter [mailto:m.richter@...] |<snip> |Despite this possibility of "user-error", Yaesu still seems to be |fixing blown finals for free. | |Mike VK2BMM | |
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Re: Power shuts off during transmit
Harry and Joyce Johnson
Hello,
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Sounds like your problem is that the power supply is not putting out enough current to operate the radio at the two higher power settings. You stated that it is a "3w" power supply but I assume it is 3 amps. It is probably marginal. Harry Johnson NV7K On Saturday, July 12, 2003, at 09:54 AM, styercpd wrote:
I have an interesting problem with my 817 where it shuts off when I try to |
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Re: Power shuts off during transmit
Harry and Joyce Johnson
Hello,
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Sounds like your problem is that the power supply is not putting out enough current to operate the radio at the two higher power settings. You stated that it is a "3w" power supply but I assume it is 3 amps. It is probably marginal. Harry Johnson NV7K On Saturday, July 12, 2003, at 09:54 AM, styercpd wrote:
I have an interesting problem with my 817 where it shuts off when I try to |
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disappointment !!!!
Demetre Koumanakos
Hi all,
I picked up my new 817 this morning, but what a disappointment !!!! the "MODE, A, B, & C" buttons don't work... The rest seem to work OK. The rig needs to get back to the dealer ! God I hate having a malfunctioning radio right out the box... 73 Demetre - SV1ENS |
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Re: [ Power shuts off during transmit]
Actually, my first guess is that the power supply or battery voltage is
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falling below the power down threshold (around 8 volts - I forget the exact number). If you select the PSU voltage display option, you will be able to see the value right before it shuts down. Chris On Sat, 12 Jul 2003, Michael Goins wrote:
checked the antenna jack, front/back? Or the antenna? Sounds like maybe swr --
73 Chris Cox N0UK, G4JEC, ex-AB0CN, ex-G8PTC RNARS #1157 EN34jv chrisc@... Ping Jockey's do it until they HEAR the burn... WWW Home Page: Cultural observation: Europeans think 100 miles is a long way; Americans think 100 years is a long time! |
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Wanted: RT-11
Nigel Gunn G8IFF/KC8NHF
Wanted: Used LDG RT-11 tuner
Condition of case unimportant as tuner is to be heavily modified and transplanted into new box. Could possibly repair a damaged unit. Thanks <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> Nigel A. Gunn. 59 Beadlemead, Milton Keynes, MK6 4HF, England. Tel +44 (0)1908 604044 or 07774 478270 (mobile) e-mail nigel@... Amateur radio stations G8IFF, M0NHF, KC8NHF Member of AMSAT-NA LM-1691, AMSAT-UK #182, ARRL, Flying Pig #385, Dayton ARA #2128, Milton Keynes ARC Supporter of MK Lightning and Dayton Bombers Ice Hockey Teams <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> |
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Power shuts off during transmit
styercpd
I have an interesting problem with my 817 where it shuts off when I try to
transmitt on 2 meters. At first I thought it was just the low power of the batteries but it still does it when I hook it up to my radioshack 3w regulated power supply. I tried it at both 5 and 2.5 watts and it shuts down whenever I hit ptt. At the lower power levels it doesnt seem to do it. Any help on my problem would be greatly appreciated. The radio is stock with no modifications whatsoever. |
Chris Cox, N0UK
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