Back in my UHF CB days, I bought a re-tuned HL-130U. Naughty boy.
Rather than put it back out there in the CB market, I'd like it tuned back to where it belongs with an eye to using it on 70cm once I have my Standard license.
Problem is I don't know anyone who can do the work. Can anyone please advise? Preferably in Sydney.
HL-130U re-alignment
Re: HL-130U re-alignment
There couldn't be that much to it unless there's been some hacking about inside. Do you know any local amateurs that could help you or perhaps a local amateur club?
Lou - VK3ALB
Being right doesn't excuse bad behaviour
Being right doesn't excuse bad behaviour
Re: HL-130U re-alignment
Hi Lou,
Maybe I'll bump into someone at the Wyong Field Day.
I peeked inside it a few years ago and I can remember it bearing scars from an explosion around one of the power transistors. Presumably it was patched up then sold to me! But it seems to work.
Apart from the stain, I couldn't really remember seeing anything out of the ordinary.
The main reason I am asking for assistance is because I was in the middle of a conversation with a tech on the Central Coast but for some unknown reason, he is not responding to my emails.
He was mainly concerned if it was an early or late version of the amp...
> Hi Ross
>
> There are a few different build types for the HL130U, Are you able to remove
> the bottom cover and tell me what transistors are fitted to your amplifier.
> They would be MRF650 or a 2SC type.
>
> I am about to talk to THP about an amplifier and I can ask them what mods
> have been done to the amplifier to take it to 477Mhz as these units were
> factory tuned. I know the first thing they will ask is what transistors are
> fitted
To which I replied...
> Hmmm. What appear to be the two main power transistors are marked as C3102.
> A third, smaller transistor is marked as C3022.
The last I heard from him was...
> No worries
>
> It is an early one, You would be looking at about $60 to retune the
> amplifier and would take around 2 weeks
When I tried to get an address to drop the unit off, I never heard from him again. That was in 2008. I can't get boo out him.
Maybe I'll bump into someone at the Wyong Field Day.
I peeked inside it a few years ago and I can remember it bearing scars from an explosion around one of the power transistors. Presumably it was patched up then sold to me! But it seems to work.
Apart from the stain, I couldn't really remember seeing anything out of the ordinary.
The main reason I am asking for assistance is because I was in the middle of a conversation with a tech on the Central Coast but for some unknown reason, he is not responding to my emails.
He was mainly concerned if it was an early or late version of the amp...
> Hi Ross
>
> There are a few different build types for the HL130U, Are you able to remove
> the bottom cover and tell me what transistors are fitted to your amplifier.
> They would be MRF650 or a 2SC type.
>
> I am about to talk to THP about an amplifier and I can ask them what mods
> have been done to the amplifier to take it to 477Mhz as these units were
> factory tuned. I know the first thing they will ask is what transistors are
> fitted
To which I replied...
> Hmmm. What appear to be the two main power transistors are marked as C3102.
> A third, smaller transistor is marked as C3022.
The last I heard from him was...
> No worries
>
> It is an early one, You would be looking at about $60 to retune the
> amplifier and would take around 2 weeks
When I tried to get an address to drop the unit off, I never heard from him again. That was in 2008. I can't get boo out him.
-
VK3MY
Re: HL-130U re-alignment
Basically all that needs doing is the input and output variable capacitors need to be retuned for max output, very simple to do if you have a insulated tuning tool and a watt meter.
Ross
Ross