| Author |
Message |
    
Perrym1962
Member
Username: Perrym1962
Post Number: 61
Registered: 11-2002
| | Posted on Tuesday, January 13, 2009 - 6:16 pm: | 
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Just wondering if anyone knows how to make a texas star modulator v plus compatible for ssb. I have heard you can switch a certain capacitor and achieve this. Thought I would see if anyone here knew about these... |
Tech808
Moderator
Username: Tech808
Post Number: 16475
Registered: 8-2002
| | Posted on Tuesday, January 13, 2009 - 6:39 pm: |
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Do a GOOGLE search for:
"MOD V Plus CW Transmitter To AMP Conversion"
It will give you the information and part's list you will need.
Hope this help's,
Lon~Tech808
CEF#0808/HAM#001/CVC#0002
Tech808@copperelectronics.com
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Perrym1962
Member
Username: Perrym1962
Post Number: 62
Registered: 11-2002
| | Posted on Tuesday, January 13, 2009 - 10:30 pm: |
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It is already converted for transmitting. I was needing to know if there is some type of mod to make it usable on ssb. It only chatters on ssb. Of course it isn't made for ssb use, but I have heard there is mod to make it usable. Thanks for the reply, Perry... |
Drzuo
Member
Username: Drzuo
Post Number: 73
Registered: 1-2006
| | Posted on Wednesday, January 14, 2009 - 3:57 am: |
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You can add a capacitor in the relay circuit to add a delay so the relay doesn't unkey as soon as you take a breath. Not having this cap and having the relay turn on and off with every syllable will cause a chirping sound over the air. You still have one issue though, the mod v looks to be a class C device and single ended. Sometimes you can still get good reports on ssb with a class C amp that is a push/push design (IE a 2 pill) albeit the people a few channels away will hate you. But having a single ended(1 pill) device will only conduct a small portion of the wave and probably sound pretty bad. The dx 250 schematic shows a 1000uf 16v cap being used from relay coil to ground(switchable on/off for AM use where it is not needed) But I've never used a value that high, depends on coil resistance of the relay too and how quick it'll drain the cap VS how long you want the delay. I think I used a 47uf 25v on my last project. |
Hotwire
Senior Member
Username: Hotwire
Post Number: 2729
Registered: 1-2005
| | Posted on Thursday, January 15, 2009 - 12:49 pm: |
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I would have swore that the Mod V Plus was auto SSB and being that all Texas Star amps are SSB compatible anyway. If it does not stay keyed during modulation then it could only mean they are not.
I KNOW I have seen them posted on other websites claiming auto ssb.
Good luck with it and if I find any useful info I'll let you know.
Kenny
CEF491
Reading the mail around Indianapolis Indiana!
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Hotwire
Senior Member
Username: Hotwire
Post Number: 2730
Registered: 1-2005
| | Posted on Thursday, January 15, 2009 - 1:02 pm: |
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OK, I did a check. There is the Mod Plus with 3 buttons and then there is the Mod V Plus. I guess the 3 button model has the SSB and the 2 button model no. Being that they are pretty much the same it should be somewhat simple to do. Examine the schematics of the 2 amps and find the capacitor on the schematic of the 3 button Mod Plus and then look to see if a cap can be installed in place on the board of your amp.
Kenny
CEF491
Reading the mail around Indianapolis Indiana!
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Drzuo
Member
Username: Drzuo
Post Number: 75
Registered: 1-2006
| | Posted on Thursday, January 15, 2009 - 9:02 pm: |
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Kenny I only looked up the schematics for the basic MOD V, I'll look for the 3 button one. It is possible they biased it for SSB. The schematics I saw showed a class c version with no cap for SSB delay. I took the value of the cap from the dx250 "killer bee"'s schematic. |
