Omegaforce S45HP???

[Robb]

Used some tough epoxy to mount four pieces of nylon that were drilled for the screws.
Two screws/inserts for each fan was enough.

The heat sink stays stone cold this way . . .

 

[Mudfoot]

I like that.

I might try to glue some rubber blocks to screw into. That should help with vibrations even better.

Good idea.

 

[Robb]

These fans were made to use with ~12v; not 13.8v. So, if there is too much voltage to them they won't run very well. Each one will run at a slightly different speed anyway and the imbalance is magnified with the additional voltage/fan speed. I might try a couple of three diodes in series and see if I can get the speed/voltage to where it should be.

Its the noise factor that I am dealing with now. Those DC brushless motors still throw off noise that is being picked up by the audio circuit. Perhaps a 472 disc cap across the +/- leads and three diodes in series on the positive lead is my next move.

 

[Lil'Yeshua]

voltage regulator

Amazon sells 1 amp. Adjustable power supply kits but the diode deal is quick and simple. op:

 

[Mudfoot]

Was on a local SSB net tonight, I was told my audio was a tad bit raspy. I listened on my TS-590 and agreed. I held the mic back a few more inches and it seemed to clear up a little.

I am used to close talking, but I don't think the stock power mic likes that much intimacy. I get good AM reports though. It almost sounds like a little RF, but need to play around a little more.

 

[2RT307]

Was on a local SSB net tonight, I was told my audio was a tad bit raspy. I listened on my TS-590 and agreed. I held the mic back a few more inches and it seemed to clear up a little.

I am used to close talking, but I don't think the stock power mic likes that much intimacy. I get good AM reports though. It almost sounds like a little RF, but need to play around a little more.

I never run mine over 12 o'clock on the mic gain. I am actually not sure how loud the factory power mic is on setting... never opened it to see. These rigs have a lot of modulation with the factory mic.

73,
RT307

 

[Lil'Yeshua]

Was on a local SSB net tonight, I was told my audio was a tad bit raspy. I listened on my TS-590 and agreed. I held the mic back a few more inches and it seemed to clear up a little.

I am used to close talking, but I don't think the stock power mic likes that much intimacy. I get good AM reports though. It almost sounds like a little RF, but need to play around a little more.

How would you keep your modulation on ssb at the optimum level without overmodulating?

 

[2RT307]

How would you keep your modulation on ssb at the optimum level without overmodulating?

This might be going over to your DX959 thread, but it applies to any SSB rig, so..... You might be surprised how little of a difference folks will see in your signal by "only" average speech at around 70% vs. peaking at 100%. Unless you have a good local that will give you an honest report on how you sound, you'll probably need to look at your transmission on a scope. I'm pretty sure you sent your rig to DTB, and he should have all the tech stuff for testing, so they could probably make a good recommendation for you once your radio is finished being tuned.

It's really not about squeezing every last watt out of the rig... it's about getting a good clean signal and audio out of it. The latter is what m42duster is trying to do with his.

73,
RT307

 

[hotrod]

these radios do have alot of audio .i went inside my mike and turned it way down
as mine new was at 3/4

 

[dd18]

Yup, Agreed, turning down the audio a bit at the mic is a good start!