RDVV 1.5W 2n3553

Everything technical about radio can be discussed here, whether it's transmitting or receiving. Guides, charts, diagrams, etc. are all welcome.
Post Reply
1608cc
who u callin ne guy bruv
who u callin ne guy bruv
Posts: 24
Joined: Wed Jan 24, 2018 8:54 pm

RDVV 1.5W 2n3553

Post by 1608cc » Mon Oct 14, 2019 11:04 am

Hi,
looking for 2n3553 RDVV 1.5W notune schematic ;)

User avatar
yellowbeard
no manz can test innit
no manz can test innit
Posts: 177
Joined: Wed Jul 08, 2015 5:40 am

Re: RDVV 1.5W 2n3553

Post by yellowbeard » Mon Oct 14, 2019 5:40 pm

There are two versions of it here listed as RDVV 1 Watt...

http://www.3-mtr.info/shareware/

1608cc
who u callin ne guy bruv
who u callin ne guy bruv
Posts: 24
Joined: Wed Jan 24, 2018 8:54 pm

Re: RDVV 1.5W 2n3553

Post by 1608cc » Mon Oct 14, 2019 6:01 pm

I saw these, but they are "tune" versions :?

I'm looking for schematic of this one :
http://www.3-mtr.info/sales/RDVV%20NoTu ... %202007V1/
You do not have the required permissions to view the files attached to this post.

RF-Head
no manz can test innit
no manz can test innit
Posts: 196
Joined: Wed Oct 15, 2014 9:25 pm

Re: RDVV 1.5W 2n3553

Post by RF-Head » Tue Oct 15, 2019 8:36 am

It is the scematic of the old 8W and the last part is of a BW 1Watt PLL board
The design is made by me in 2005-2006 and PKBee/rdvv made a new layout of it

1608cc
who u callin ne guy bruv
who u callin ne guy bruv
Posts: 24
Joined: Wed Jan 24, 2018 8:54 pm

Re: RDVV 1.5W 2n3553

Post by 1608cc » Tue Oct 15, 2019 9:23 am

RF-Head Thanks :D

radium98
tower block dreamin
tower block dreamin
Posts: 419
Joined: Fri Aug 26, 2016 7:01 pm

Re: RDVV 1.5W 2n3553

Post by radium98 » Wed Oct 16, 2019 4:54 pm

Nice infos .anyone have a layout of an 25 to 30w no tune or easy tune one trimmer for 2sc1946a

User avatar
teckniqs
proppa neck!
proppa neck!
Posts: 2644
Joined: Thu Aug 21, 2014 11:37 am

Re: RDVV 1.5W 2n3553

Post by teckniqs » Thu Oct 17, 2019 7:39 am

Still got one of my original RDVV's I got from you RF HEAD back in 2005.

nrgkits.nz
Neckmin
Neckmin
Posts: 295
Joined: Fri Oct 17, 2014 10:35 am

Re: RDVV 1.5W 2n3553

Post by nrgkits.nz » Thu Oct 17, 2019 11:07 am

radium98 wrote:
Wed Oct 16, 2019 4:54 pm
Nice infos .anyone have a layout of an 25 to 30w no tune or easy tune one trimmer for 2sc1946a
If it’s running on anything less than 15v it will need to be tuned for the frequency it’s on, because the output impedance of the final will be very low. Unless the “designer” is Paul Hollings and makes a mess of things because he has no idea what he’s doing, his 30w “no tune” is horribly inefficient and the current draw at 13.8v is insane.

Albert H
proppa neck!
proppa neck!
Posts: 1610
Joined: Tue Apr 05, 2016 1:23 am

Re: RDVV 1.5W 2n3553

Post by Albert H » Thu Oct 17, 2019 8:41 pm

There used to be a 20 Watt 13V8 "no-tune" amplifier made by one of the Italian companies. Current consumption was over 7 Amps - over 70 Watts was radiated as heat! If the two fans blowing on the huge heatsink failed, there was a 50 / 50 chance of the output transistor frying before the fuse blew.
"Why is my rig humming?"
"Because it doesn't know the words!"
;)

radium98
tower block dreamin
tower block dreamin
Posts: 419
Joined: Fri Aug 26, 2016 7:01 pm

Re: RDVV 1.5W 2n3553

Post by radium98 » Sat Oct 19, 2019 8:15 am

no i mean a new old design :)

rigmo
no manz can test innit
no manz can test innit
Posts: 117
Joined: Wed Jan 30, 2019 9:35 pm

Re: RDVV 1.5W 2n3553

Post by rigmo » Fri Jun 26, 2020 7:54 pm

2n3553 5W for sure!

rigmo
no manz can test innit
no manz can test innit
Posts: 117
Joined: Wed Jan 30, 2019 9:35 pm

Re: RDVV 1.5W 2n3553

Post by rigmo » Fri Jun 26, 2020 7:58 pm

5W 2n3553
You do not have the required permissions to view the files attached to this post.

User avatar
teckniqs
proppa neck!
proppa neck!
Posts: 2644
Joined: Thu Aug 21, 2014 11:37 am

Re: RDVV 1.5W 2n3553

Post by teckniqs » Fri Jun 26, 2020 8:35 pm

If you're very lucky you might get as much as 4 to 5w from a 2n3553 but it will get extremely hot at that power.

...I think about 2.5 to 3w is about as much as you should push those.

rigmo
no manz can test innit
no manz can test innit
Posts: 117
Joined: Wed Jan 30, 2019 9:35 pm

Re: RDVV 1.5W 2n3553

Post by rigmo » Fri Jun 26, 2020 9:01 pm

teckniqs wrote:
Fri Jun 26, 2020 8:35 pm
If you're very lucky you might get as much as 4 to 5w from a 2n3553 but it will get extremely hot at that power.

...I think about 2.5 to 3w is about as much as you should push those.
depend of schematic to... do you try mrf237?

User avatar
teckniqs
proppa neck!
proppa neck!
Posts: 2644
Joined: Thu Aug 21, 2014 11:37 am

Re: RDVV 1.5W 2n3553

Post by teckniqs » Fri Jun 26, 2020 11:10 pm

Yes and that would be much better for 5w but will still need very good cooling, a small clip on heatsink won't be good enough to cool it at 5w.
SD1127 is the same as MRF237 device, plus 2SC1947 is also very similar in performance,

rigmo
no manz can test innit
no manz can test innit
Posts: 117
Joined: Wed Jan 30, 2019 9:35 pm

Re: RDVV 1.5W 2n3553

Post by rigmo » Sun Jun 28, 2020 12:45 pm

teckniqs wrote:
Fri Jun 26, 2020 11:10 pm
Yes and that would be much better for 5w but will still need very good cooling, a small clip on heatsink won't be good enough to cool it at 5w.
SD1127 is the same as MRF237 device, plus 2SC1947 is also very similar in performance,
i need 1.5-2w max but cool run as-possible

User avatar
Bton-FM
tower block dreamin
tower block dreamin
Posts: 305
Joined: Sun Jun 16, 2019 2:55 pm
Location: South east

Re: RDVV 1.5W 2n3553

Post by Bton-FM » Sun Jun 28, 2020 1:19 pm

Why don't you run higher power device with <50% of its power.Maybe a RD06?

User avatar
teckniqs
proppa neck!
proppa neck!
Posts: 2644
Joined: Thu Aug 21, 2014 11:37 am

Re: RDVV 1.5W 2n3553

Post by teckniqs » Sun Jun 28, 2020 3:19 pm

rigmo wrote:
Sun Jun 28, 2020 12:45 pm


i need 1.5-2w max but cool run as-possible
I would recommend the 2sc730 for this.

Post Reply