| Author |
Message |
    
20mg355
Junior Member
Username: 20mg355
Post Number: 15
Registered: 6-2004
| | Posted on Thursday, August 12, 2004 - 10:08 am: | 
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Hello Friends
I have a question about DeltaForce and AM modulation. I don`t use AM so much, but heard alot about "swing" :-) well my deltaforce have from 2-8 watts deadkey Min/max power.but it dosen`t swing too much :-) on AM with micgain at 12 0`clock my PEAK READING RF POWER METER shows about 3 on the meter and on my AVAIR AV-600 watt meter the power increase from 8 to 10 watt while I say the usall "Four" in to the mic. with micgain at full the result is 5 on the PEAK READING RF POWER METER and,power increase from 8 to 11 watt, (all in to a dummyload) is this correct ?.
The user manual says:
AM: 8 Watts Average (Max.)
30 Watts Peak (Max.)
anyone ?
Yours Sincerly
Tom In Oslo
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Tech548
Moderator
Username: Tech548
Post Number: 226
Registered: 5-2004
| | Posted on Friday, August 13, 2004 - 12:22 am: |
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Tom
That sounds about right for a stock DeltaForce. With your power turned all the way opened on F/M, that's where you will see around 30 watts. The power you see on F/M is generally the same power you will see on SSB. These Deltas are the first radio I've ever seen do this.
In the event that you don't know, there are quite a few upgrade modifications that can be done to the Delta. When done correctly, that radio has capabilities (into a dummyload or "flat" SWR) of 35-38 watts PEP in all modes....sometimes a bit more.
I personally own 3 Deltas and can't say enough good things about them. This is the first decent radio to come along since the "1st generation" RCI-2950.
Jeff
Tech548 |
20mg355
Junior Member
Username: 20mg355
Post Number: 16
Registered: 6-2004
| | Posted on Friday, August 13, 2004 - 12:36 pm: |
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hello jeff
Yes I totally agree, mine does 49 watts FM and between 42-43watts on peak SSB (don`t have signal generator so I have to whistle :-) in to a dummy load, great radio !!!!
Tom
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Tech548
Moderator
Username: Tech548
Post Number: 231
Registered: 5-2004
| | Posted on Friday, August 13, 2004 - 8:24 pm: |
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Tom
There are only three ways you could possibly see that much wattage from your Delta.
1- Check the SWR on your dummyload. If it isn't flat, your RF power readings will be incorrect,
2- Your RF power meter is out of calibration (reading high),
3- or possibly your power supply is set at 16 or more volts. Check its voltage. I personally set all of mine at exactly 14 volts.
Something just doesn't sound right here. These are very high power readings.
Jeff
Tech548 |
20mg355
Junior Member
Username: 20mg355
Post Number: 17
Registered: 6-2004
| | Posted on Saturday, August 14, 2004 - 4:53 am: |
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Hello Jeff
I will check as i write this post :-)
swr on dummy is correct, also antenna witch is orginal 1.5 when tuned down with tuner to 1.1 shows the same on the AVAIR AV-600.
tested my watt meter on my MFJ 941E tuner there the output is 40 watts on FM and 40 watts on ssb, this meter got checked 1 month ago by my local ham shop and found to bee correct :-)
it also shows about 105 watts with my FT-990 connected
my power supply Daiwa PS.313 shows 14 volts.
checked my AVAIR againt my FT-990 now an it shows way too much (10 watts). there is the promlem !! also my meter in MFJ 941E shows a little too much power.
Tom |
20mg355
Junior Member
Username: 20mg355
Post Number: 18
Registered: 6-2004
| | Posted on Saturday, August 14, 2004 - 6:37 am: |
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hello again :-)
well my AVAIR AV-600 (same as Diamond SX-600 just another name) shows wrong in the 200watt
reading, anyone who knows witch pot to adjust, it`s a bunch of them inside the meter :-)
(8 of them)
Yours sincerly
Tom
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Patzerozero
Junior Member
Username: Patzerozero
Post Number: 30
Registered: 7-2004
| | Posted on Sunday, August 15, 2004 - 11:09 pm: |
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tech 548- where can i find upgrades for delta power increases? |
Tech548
Moderator
Username: Tech548
Post Number: 238
Registered: 5-2004
| | Posted on Monday, August 16, 2004 - 12:12 pm: |
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Tom
I'm glad you found the culprit. When you said that you were getting 40+ watts from a pair of 2sc-1969 finals, something just didn't smell right.
Also, when making adjustments into a dummyload with a flat SWR, there really isn't a need for a Tuner. I'm surprised you would be using one anyways unless you have a antenna that isn't tuned for 11 meters.
Other than that, it appears that you have a good station there in Norway. Good work Tom.
Jeff. |
Tech548
Moderator
Username: Tech548
Post Number: 239
Registered: 5-2004
| | Posted on Monday, August 16, 2004 - 12:21 pm: |
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Patzerozero
Personally, I can't say enough good things about these Deltas. For many years I ran the 1st Generation 2950-RCIs until the Deltas were offered to the general public. The Delta's are a great SSB radio.
Jeff
Tech548 |
