What is this and why...48T

[longhaireddwb]

I recently got a 48T and its been modded. I just want to know what is up with these mods. Here is a picture of a resister and diode installed in the corner. Not too sure what its about. It had some shrink tubing over it to protect the traces around it. I just took it off to get a good picture.

Super swing mod has been done I'm guessing. R264 has been completely removed and a diode put in its place. I thought the resister was just lifted to do this mod.

This radio gets smoking hot. I was on it for about 30 minutes and I noticed a little heat when I put my hand close to the radio. I touched the heat sink on the bottom where the two 2290? are and it was too hot to touch. It would burn you if you put your hand on it for more than 3 seconds.

Anyone have a clue as to what has been done here and why? I'm thinking of removing this mod and putting the resister back in r264 with the diode and see if it runs cooler but I'm new to the big radios and dont want to mess things up.

Whats your opinion?op:

 

[longhaireddwb]

Took me forever to get this picture a normal size.

 

[TonyV225]

Is that the swing mod??

 

[Radio Tech]

This is part of the npc-rc mod

 

[longhaireddwb]

if its part of the npc rc mod than shoudn't the resister still be in r264 along with an added diode?

what you see on the silder side was not done at r264.

 

[9C1Driver]

Maybe it's had the Super hackpack done to it by the one and only.

 

[Chop]

Maybe it's had the Super hackpack done to it by the one and only.

 

[longhaireddwb]

do u think its the super hack pack? I didn't find any speaker wire and the tr for the limiter is still in tack.

 

[longhaireddwb]

Here's what I did.
I took the mod out that is in the picture. Took the diode out of r264 and put the proper resister in its place. Did an alignment according to the specs I found on CBtricks. Now the radio is doing 175pep instead of 210pep. The RF power is still 10 - 40 and the radio runs much cooler.

I'm tempted to try the super swing mod but with the variable RF power what would be the reason in doing that.

I think I might need to mess with the modulation again as I can hear it kicking in and stealing away some of my audio at times.

Well, I think this radio will last much longer now.

I didn't find any info on setting the Bias on the final and base. Does anyone have this info?

Thank you all for the info on this and getting me going in the right direction with it.

It still has a tiny bit of muffled audio in it. It don't sound as good as my 98VHP. Anyone got a clue as to why that might be or how to correct it?

Thanks again and hope to hear some more suggestions.

 

[hotrod]

is it muffled on low dk or high dk?
if both try lowering both
high dk first to 30 watts'
then lowdk to 5 watts
this may/maynot work wont hurt anything though
as for modulation DONT do any swing mods just crank the modulation vr
all way up that should give ya more than enough audio

 

[longhaireddwb]

thamks for that. ill give it a try.

anything on bias anybody?