300W BLF278 PA 48V (PA0V Nanko)

2m & 70cm discussion - antennas, propagation, operating, etc
VK4DD

Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by VK4DD »

Hi Gents,

If you are about to solder you FET in place you can send me a picture.
From experience I know that HAMS who mailed me a picture are far more successful than those who won't.
So please do so and I will take the time to mark up your picture.
Here is one example which could be useful for all to see.

73 Ron
VK4DD
Attachments
SEND IN YOUR PICTURE !!
SEND IN YOUR PICTURE !!
VK4DD

Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by VK4DD »

Hi Gents,

A new Sequencer, Fet Switch and Protection has been developed by VK4DD.
Everything on one single PCB.
It can also drive Analog meters.
The PCB needs a supply voltage between 15 and 28V but can be used to switch and control 48V PA's
using the BTS660.

More info here
http://www.vk4dd.com/forum/viewtopic.php?f=15&t=107

If you want you can also connect it to a digital display (GLCD by VK4DD).

73 Ron
VK4DD
VK4DD

Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by VK4DD »

Hi Gents,

I would recommend to contact NXP and ask them for their official distributor.
You can go to the website http://www.nxp.com
search for the BLF278 and you can see who has them in stock.

Experience has learned me that Ebay and other distributors are not a good choice.
While others might have had luck and got good fets It is certainly not always the case.
So be aware of that.

This forum is no longer maintained by me.

I am not trying to hijack of users of this very active VK logger forum. But if you need to know the latest findings and info on this topic than login and register on http://www.vk4dd.com/forum

Above forum is maintained by me. Updating only 1 forum saves me heaps of time.

Have fun experimenting with my amplifier PCB's.

73 Ron
VK4DD
9A9PP

Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by 9A9PP »

Hallo Ron,

your online store do not work anymore?

Have anyone to sell one PCB for Amp with BLF278, 48V?

I have buy from Hellenic rf lab one complete modul, but now when I put BIAS voltage over 2.5V then amp goes to oscillations.
I have try everything, but without success. This modul work with FM OK, but I need SSB.
I know that is no place to ask for help, but if anyone know solution or can help I will be very grateful.

Please, if anyone have for sell PCB from this forum, then email me.

Thank you very much in advance.
Attachments
shema_pojacala_popis_dijelova.jpg
Modul.JPG
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ZL3RC
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Posts: 113
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Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by ZL3RC »

I have two of these boards http://vk4dd.com/index.php?option=com_c ... 1&Itemid=3 If these are of any use to you I can send them to you free. You can email me or post here.

73 Roger
Roger
ZL3RC aka ZL3THQ RE66FL
http://www.qrz.com/db/ZL3THQ.
9A9PP

Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by 9A9PP »

Hello Roger,

I have send you email on your QRZ email address.

Greetings from Croatia,
Mile, 9A9Y
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ZL3RC
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Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by ZL3RC »

Reply sent :D
Look forward to your progress and being of any help I can.

Roger.
Roger
ZL3RC aka ZL3THQ RE66FL
http://www.qrz.com/db/ZL3THQ.
9A9PP

Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by 9A9PP »

I have read email :D
I answer you today. Here is now time for sleep, hi :(

Thank you very much and best regards from me and Ina.
VK3BSF

Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by VK3BSF »

simpli_city212 refer to this site
https://www.google.com.au/search?q=simp ... 8gfsiYHwCQ

this guy is in Nigeria
9A9PP

Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by 9A9PP »

Hello Roger,

Did you receive my last email that I have send to you?

Best regards.
ZL2FAE
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Location: Waikanae New Zealand

Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by ZL2FAE »

Ron VK4DD has dissapeared into the ether!.

I purchaced one of the helianic boards a few years ago after being led down by VK4DD and found it unsatable also.
Unfortunetely the item took so long to get to me I was unable to post feedback when it arrived. Ebay refused to help. :evil:
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Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by VK4GHZ »

ZL2FAE wrote:Ron VK4DD has dissapeared into the ether!.
It appears Ron no longer holds a ham callsign now.
Adam, Brisbane
vk4ghz.com
VK4GHZ on Youtube
VK4GHZ on Odysee


10 things that happen when you stop checking Facebook constantly: http://tiny.cc/t5h7cz

How to quit Facebook: https://www.consumerreports.org/social- ... -facebook/
VK4TI
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Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by VK4TI »

VK4GHZ wrote:Ron VK4DD has dissapeared into the ether!.
It appears Ron no longer holds a ham callsign now.[/quote]I cant establish if he is still living over your side of town anymore , perhaps he did return to Europe ?
VK7DX
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Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by VK7DX »

vk4dd website is still working

www,vk4dd.com
VK4TI
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Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by VK4TI »

VK7DX wrote:vk4dd website is still working

www,vk4dd.com
paid through to september 2015 on a whois
VK2GOM

Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by VK2GOM »

Looks like ordering anything from there has been shut down though?

73 - Rob VK2GOM / GW0MOH
VK5APN
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Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by VK5APN »

Last email from him to me was on 8/5/14.

Seems not interested in assisting or AR.

Have not tried ringing him

A real pity, his products were well designed and put together.

Hope all is OK

Wayne
VK3UH
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Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by VK3UH »

Interesting. I subscribed to the 4DD website about 4 months ago, and heard nothing for ages. Then an email turned up about 6-7 weeks or so back approving my membership & containing a password (which works), so someone must be looking at the site occasionally.

Curiouser and curiouser!

Regards,
Ken
9A9PP

Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by 9A9PP »

Pity that Ron no longer sells PCBs for amplifiers.
Or at least that someone has the PCB in any format (eg. Eagle, Proteus, PDF, etc..) so that we can make a PCB for the amplifier.
VK4TI
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Re: 300W BLF278 PA 48V (PA0V Nanko)

Post by VK4TI »

9A9PP wrote:Pity that Ron no longer sells PCBs for amplifiers.
Or at least that someone has the PCB in any format (eg. Eagle, Proteus, PDF, etc..) so that we can make a PCB for the amplifier.
I might have some untouched hf boards somewhere
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