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PROBLEM WITH FR-817 WITH HL-50B AMPLIFIER ! ! ! ! !

[email protected]
 

A problem has developed when using the FT-817 with my Tokyo-Hy-Power 50 Watt
HL-50B brick amplifier.


In the CW mode there is a sizable time delay, like ten seconds or more,
before a full sensitivity receive condition returns after a dit or dah has
been sent. Sometimes it will recover faster by helping it along a bit by
sending an extra dit or so. The CW delay is set to 10 ms also. You hear the
rig return to receive, but there is a noticeable receive desensitization
period of a least 10 seconds. THE RIG DOES NOT DO THIS BAREFOOT - - ONLY WITH
THE HL-50B 50 WATT AMPLIFIER ON ! THIS BRICK AMPLIFIER SITS RIGHT NEXT TO
THE FT-817 AT THE OPERATING POSITION [MAYBE 2 INCHES AWAY] !


Suspecting this is an RFI problem, I added toroids to the DC input and to the
CW keying line of the FT-817, and a toroid to DC input of the HL-50B
amplifier. I unplugged the external speaker line and am listening through the
FT-817 internal speaker. The antenna is a Force 12 Yagi about 20 feet above
the rig, on the roof of the house. The FT-817 and the ATU are grounded to a
cold water pipe. The HL-50B brick amplifier is presently not directly
grounded, but is grounded through the ATU.[there is no grounding lug on the
HL-50B amplifier]


I am convinced that because the FT-817 works perfectly in the barefoot mode,
that there is indeed a self induced RFI related problem, set up by me.


Any thoughts out there!


73,


Norm Wesler K2YEW

K2YEW@...
Re: InRad 300Hz CW Filter

[email protected]
 

I sold my 500hz filter and bought a 300hz. I like the 300hz better. Really
tight.
Dave K1EPJ

In a message dated 5/19/2001 21:44:16 PM Eastern Daylight Time, ka5y@...
writes:

<< Looking for comments on the 300Hz filter, fix'n to buy and undecided
on the 300 vs 500Hz??????

73
Paul
KA5Y
>>
Kenwood's new TH-F6A Tribander ht

[email protected]
 

Check out the new eGroup for Kenwoods new Triband ht! this is a cool
little radio with 144, 220 & 440mHz and wideband recieve!
Need help: 817 power supply

 

Has anybody found a 2 amp wallwart style supply that works with the 817?
I am going crazy looking for a "NON- SWITCHING" supply that is in the style of a wallwart.
Thanks everybody,

Bill W9WCR
Re: InRad 300Hz CW Filter

Pres Waterman
 

Looking for comments on the 300Hz filter, fix'n to buy and undecided
on the 300 vs 500Hz??????
500 in my opinion

Pres Waterman W2PW
c/o Patchogue Motors, Inc.
Long Island Ford and Kia dealer

GO BILLS!
Re: 3-12V/2000mA AC-to-DC Travel Adapter 273-1675 with 817 ?

Pres Waterman
 

It doesn't need 3 amps. My 12V 2.5-amp supply does just fine with
the 817. I think it might need something just above 2 amps to do
5W transmit, but I have not checked the exact rate that is used.
While not measuring it myself the QST review in the April 2000 QST
measured 1.9 Amps at 5 watts output. No mention if this includes the
power for backlighting or not. The Specs say 2 amps.

Yup. I have a 2A supply with a 2A fuse and had no problem

Pres Waterman W2PW
c/o Patchogue Motors, Inc.
Long Island Ford and Kia dealer

GO BILLS!
1200+ members

Pres Waterman
 

Wow, Barry, you called that one on the money! ( private joke )

We had a nice little get-together, about 20-30 total wandered over to say
"Hi" including special surprise guest Vern W6MMA of
who gave a nice "dog-n-pony show"

Even a few new purchasers and list-joiners...

This little rig has really re-lit my fire...

Pres Waterman W2PW
c/o Patchogue Motors, Inc.
Long Island Ford and Kia dealer

GO BILLS!
InRad 300Hz CW Filter

[email protected]
 

Looking for comments on the 300Hz filter, fix'n to buy and undecided
on the 300 vs 500Hz??????

73
Paul
KA5Y
Re: InRad 300Hz CW Filter

Rich Bay
 

I have had the InRad 300 Hz filter for about a month. I like it.

K0FUN
Re: 3-12V/2000mA AC-to-DC Travel Adapter 273-1675 with 817 ?

 

Joe - do it. I took one to Belgium and ran it for the 10 hours from the
hotel room in the ARRL phone contest. Oddly enough, even with my screaming
to get through, the supply performed flawlessly, until I turn on the dial
light. Then it tripped just as described. I turned off the light, and it
kept working fine. I thought I was running full tilt at the time - it would
be a wierd coincidence that the light was enough to push it over the brink,
but stranger things have happened - maybe the individuallll supplies vary a
bit - but it did the job well (which was really lucky, cuz I bought it 2
hours before I left for the airport and didn't get but about 5 minutes to
check it out before I left. Happy hunting. Scott
IN CHAT ROOM NOW 22:00 GMT (UK) NO MESSAGE G0VGZ

[email protected]
 

Re: 3-12V/2000mA AC-to-DC Travel Adapter 273-1675 with 817 ?

Paul Davidson
 

** Reply to message from wd9ewk@... on Sat, 19 May 2001 18:35:11
-0000

Hi Laz.

Doesn't the FT817 need 3amps to xmit at 5W, maybe even at 2.5W? Are
It doesn't need 3 amps. My 12V 2.5-amp supply does just fine with
the 817. I think it might need something just above 2 amps to do
5W transmit, but I have not checked the exact rate that is used.
While not measuring it myself the QST review in the April 2000 QST
measured 1.9 Amps at 5 watts output. No mention if this includes the
power for backlighting or not. The Specs say 2 amps.

73 de Paul Davidson
Amateur Radio Station, VE3UUM
Re: FTBasic - Anyone know how to store split frequency?

 

The banks are for while you are using the software and are connected
to the radio. Do not confuse them (you already have I see) with the
200 memories in the radio that you can "clone" into and out of the
program.

You can set an offset with either the direction and size or the actual
frequency.

--
Richard Clemens
clemens@...

----- Original Message -----
From: <jduffy@...>
To: <FT817@...>
Sent: Saturday, May 19, 2001 2:23 PM
Subject: [FT817] FTBasic - Anyone know how to store split frequency?


I just purchased FTbasic. Does anyone know how I store split
frequency/bands
into the memory for using the FM sats?

Also there are 200 memories, but the programs only has six banks of
12
memories each or 72 memory positions. Why is that?

Regards,

Duffy - WB8NUT





***____FLASH_____**
FT-817 users GET TOGETHER at Dayton Hamvention Saturday at 3PM. Meet
at the food court nearest to the Yaesu booth. 439.125 simplex.
To unsubscribe from this group, send an email to:
FT817-unsubscribe@... and for a great FAQ ( Frequently Asked
Questions ) see



Your use of Yahoo! Groups is subject to
Re: FTBasic - Anyone know how to store split frequency?

[email protected]
 

Thanks,

But I still do not understand how I store, for instance a 2 meter frequency
for transmitting and a 440 frequency for receive....not using the offset
method. I can't figure it out.

Regards,

Duffy
Re: 3-12V/2000mA AC-to-DC Travel Adapter 273-1675 with 817 ?

[email protected]
 

Hi Laz.

Doesn't the FT817 need 3amps to xmit at 5W, maybe even at 2.5W? Are
It doesn't need 3 amps. My 12V 2.5-amp supply does just fine with
the 817. I think it might need something just above 2 amps to do
5W transmit, but I have not checked the exact rate that is used.

you just using to charge the nicad? I am using the RS's other
travel
power supply the 276-503 (I believe). Which is rated for 3amps and
I have
no probs with it. Some have complained about noise but others have
found it to be quiet, depending on the unit you get get (just get it
exchanged until you find one that you like). This was also reported
in the most recent QRP Quarterly, QRP-ARCI's organ.
I also tried that 3-amp worldwide supply. Like the smaller 2-amp
supply mentioned previously, noisy for me - so I went to that cheap
wall-wart and made it quiet. I could have done the same with these
other supplies, but at $10 I had room to invest a little more $$$
and some time compared to $30 or $50 and then adding on.


73! Patrick WD9EWK/7
test

David Perry
 

Nature


test
FTBasic - Anyone know how to store split frequency?

[email protected]
 

I just purchased FTbasic. Does anyone know how I store split frequency/bands
into the memory for using the FM sats?

Also there are 200 memories, but the programs only has six banks of 12
memories each or 72 memory positions. Why is that?

Regards,

Duffy - WB8NUT
Re: 1600 mah NiMH RC car packs

Pres Waterman
 

I just saw 3,000mAH sub-C at Dayton

Pres Waterman W2PW
c/o Patchogue Motors, Inc.
Long Island Ford and Kia dealer

GO BILLS!

----- Original Message -----
From: David Perry <david.perry3@...>
To: <FT817@...>
Sent: Saturday, May 19, 2001 3:39 AM
Subject: Re: [FT817] 1600 mah NiMH RC car packs


Sharyl,
if you are going to the trouble of using external battery packs velcor'd
to
the case don't touch the 1600mAh ones. You can buy very good 2000 mAh sub
C
and 3000mAh sub D cells at low prices these days. They still charge fast
(30 mins if you really need 'em to) and will last much longer.

Model shops cell electric flight packs of 9.6v if that's what you want
for,
over here anyway, around 25gbp.

It is a good idea and one that I have a couple of cell packs to try later.

David G4YVM
----- Original Message -----
From: "Sharyl - W3VET" <w3vet@...>
To: <FT817@...>
Sent: Saturday, May 19, 2001 12:19 AM
Subject: [FT817] 1600 mah NiMH RC car packs


Have you been able to test how long it takes to discharge them that way?
I looked at them and they sure looked good.
If these are the 9.6 volt ones, Do you get the full 5 watts out?

Sharyl

----- Original Message -----
From: <don@...>

So I use the 1600 mah NiMH RC car packs from RS and their 4.5 hour 2-
pack charger with an adapter from the pack connector to the jack on
the rear of the radio - made from 18 gauge wire with a fuse. The pack
velcros to the bottom of the case at the front of the radio and does
double duty in proping up the front of the radio.


***____FLASH_____**
FT-817 users GET TOGETHER at Dayton Hamvention Saturday at 3PM. Meet at
the food court nearest to the Yaesu booth. 439.125 simplex.
To unsubscribe from this group, send an email to:
FT817-unsubscribe@... and for a great FAQ ( Frequently Asked
Questions ) see



Your use of Yahoo! Groups is subject to




***____FLASH_____**
FT-817 users GET TOGETHER at Dayton Hamvention Saturday at 3PM. Meet at
the food court nearest to the Yaesu booth. 439.125 simplex.
To unsubscribe from this group, send an email to:
FT817-unsubscribe@... and for a great FAQ ( Frequently Asked
Questions ) see



Your use of Yahoo! Groups is subject to

Re: Battery Connectors and wiring.

David Perry
 

Re "the next big one"...shouldn't you be moving house rather than playing
wireless? ;o(


David G4YVM

----- Original Message -----
From: <don@...>
To: <FT817@...>
Sent: Friday, May 18, 2001 11:38 PM
Subject: [FT817] Re: Battery Connectors and wiring.


Well - you very well might be correct - my reply was meant to explain
one reason WHY it could be an issue - the numbers I was using were
for the sake of argument - I don't know what the voltage is that the
radio quits working and I don't have the time to waste studying the
discharge graphs.

But another point is that that power lost in the resistance of the
system has to go somewhere, and it ain't into powering the radio - it
is in heating up the wires and contacts that aren't adequate to do
the job.

Actually, I seldom use the internal tray that I have fused and
stuffed with Radio Shack 1600 mah NiMH AA cells in that it takes so
long to charge them and it is a pain to remove the radio from the
case with the "Plumbers Delight" antenna mount on the rear connector.

So I use the 1600 mah NiMH RC car packs from RS and their 4.5 hour 2-
pack charger with an adapter from the pack connector to the jack on
the rear of the radio - made from 18 gauge wire with a fuse. The pack
velcros to the bottom of the case at the front of the radio and does
double duty in proping up the front of the radio.

I also have a approx 15" square solor panel that charges the packs in
about 6 hours - se ya on Field day QRP Battery power with the natural
power multiplier - portable from the patio table with a Screwdriver
antenna. A ligit location for simulated emergency conditions as I
live about 600 feet from the north/south center of the Hayward fault
where the state OES predicts the next "big one" is most likely to be
centered!

Don
W6ZO




--- In FT817@y..., bbadger@y... wrote:
Which battery technology are we talking about? When NiMH batteries
sag below 1.1 volts per cell at 2 amps draw, they are about 95%
drained (based on the discharge graphs I have on hand), and it drops
off quickly from there, below 1 volt at about 97% of capacity. So
between 8.8 volts and 8.0 volts (where the radio shuts down) you
have
about 2% of the usable capacity of the NiMH cells.

So the difference between shut off at 8.5 volts (stock) and 8.0
volts
(after modification) is less than 2% of the capacity of the cell.
Call that maybe 30 seconds of extra transmit time per recharge.

I'm not trying to troll here. Are my numbers right? If they are, I
don't see that there is an argument to be made for replacing the
power
connectors and resoldering new leads to the board.

In terms of reliability, a dedicated NiMH pack (like the Maha) is
going to be better than the battery tray, simply because soldered
cells are going to last longer than spring contacts, and because
heating up the NiMH cells from the power dissipation in the battery
tray will unnecessarily shorten their useful lifetime.

But I don't see voltage drop as being very important, otherwise.
--
Brian N0KZ

--- In FT817@y..., don@h... wrote:
Well - yes - I think you are missing something - let's say -
since I
don't have the EXACT value - that the radio stops working at 8.5
volts - and you have .4 volt drop between the battery and the
load
(the radio) - so when the battery is discharged to 8.9 volts -
the
radio quits on TX. Where if you could reduce the voltage drop
between
the battery and the load to say .15 volts, then the battery could
go
down to 8.65 before the radio sops working. By having less
voltage
drop between the source and the load, you are able to use more of
the
available battery capacity.


--- In FT817@y..., bbadger@y... wrote:
--- In FT817@y..., KG4CHX@A... wrote:
While experimenting I found the following voltage drops under
full
load:
Battery Tray 200MV!
New Connector 35 MV
Wire from connnector to PC board 100MV
Wire from batery to connector 100MV
You can see that if you are using the battery tray and stock
wiring.
This is all lost in heat energy. 2amp X .5 volts = 1 watt lost
to
voltage drop!!
Does it really matter? According to K6XX analysis of current
drain
during transmit, the current drawn by the power amplifier is
largely
unaffected by voltage. As a result, that 1 watt that we could
conceivable recover by replacing the power connectors will just
result
in 1 watt more power dissipation in the MOSFETs.

Or am I missing something?
--
Brian N0KZ

***____FLASH_____**
FT-817 users GET TOGETHER at Dayton Hamvention Saturday at 3PM. Meet at
the food court nearest to the Yaesu booth. 439.125 simplex.
To unsubscribe from this group, send an email to:
FT817-unsubscribe@... and for a great FAQ ( Frequently Asked
Questions ) see



Your use of Yahoo! Groups is subject to

Re: 1600 mah NiMH RC car packs

David Perry
 

Sharyl,
if you are going to the trouble of using external battery packs velcor'd to
the case don't touch the 1600mAh ones. You can buy very good 2000 mAh sub C
and 3000mAh sub D cells at low prices these days. They still charge fast
(30 mins if you really need 'em to) and will last much longer.

Model shops cell electric flight packs of 9.6v if that's what you want for,
over here anyway, around 25gbp.

It is a good idea and one that I have a couple of cell packs to try later.

David G4YVM

----- Original Message -----
From: "Sharyl - W3VET" <w3vet@...>
To: <FT817@...>
Sent: Saturday, May 19, 2001 12:19 AM
Subject: [FT817] 1600 mah NiMH RC car packs


Have you been able to test how long it takes to discharge them that way?
I looked at them and they sure looked good.
If these are the 9.6 volt ones, Do you get the full 5 watts out?

Sharyl

----- Original Message -----
From: <don@...>

So I use the 1600 mah NiMH RC car packs from RS and their 4.5 hour 2-
pack charger with an adapter from the pack connector to the jack on
the rear of the radio - made from 18 gauge wire with a fuse. The pack
velcros to the bottom of the case at the front of the radio and does
double duty in proping up the front of the radio.


***____FLASH_____**
FT-817 users GET TOGETHER at Dayton Hamvention Saturday at 3PM. Meet at
the food court nearest to the Yaesu booth. 439.125 simplex.
To unsubscribe from this group, send an email to:
FT817-unsubscribe@... and for a great FAQ ( Frequently Asked
Questions ) see



Your use of Yahoo! Groups is subject to


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