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Does anyone have news of this? RF Parts is no longer stocking RD16HHF1 and they have marked RD15HVF1 as EOL. where does that leave us all?
- f
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I got some RD15HVF1's a while back at?
but the RD16HHF1's are rare as hens teeth:
--
Ryan Flowers - W7RLF
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I am confused.? Looking at this page:?? RF Parts still lists this as available.
Marco - Kg5PRT
On Wed, Mar 14, 2018 at 2:45 PM, Ashhar Farhan <farhanbox@...> wrote: Does anyone have news of this? RF Parts is no longer stocking RD16HHF1 and they have marked RD15HVF1 as EOL. where does that leave us all?
- f
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HI Farhan.
Does this mean V2 uBitx will have RD16HHF1 ??!?!
LOl, thanks,
73.
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Just ordered ten RD15HFV1’s from RF Parts.? Considering how SLOOOOOWWWW their site is there must be a run on the RD’s ;-)?? . Mike K5ESS ?
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From: [email protected] [mailto:[email protected]] On Behalf Of M Garza
Sent: Wednesday, March 14, 2018 3:30 PM
To: [email protected]
Subject: Re: [BITX20] RD transistors, unobtanium? ? I am confused.? Looking at this page:?? RF Parts still lists this as available. ? On Wed, Mar 14, 2018 at 2:45 PM, Ashhar Farhan <farhanbox@...> wrote: Does anyone have news of this? RF Parts is no longer stocking RD16HHF1 and they have marked RD15HVF1 as EOL. where does that leave us all? ?
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Mouser had them recently too...
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it:
email:??bill@... ?
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On Mar 14, 2018, at 3:28 PM, Ryan Flowers < geocrasher@...> wrote: I got some RD15HVF1's a while back at?
but the RD16HHF1's are rare as hens teeth:
--
Ryan Flowers - W7RLF
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Also ordered 6 while having a leisurely beer to pass the time between screens.
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I am trying to find transistors for our future work. The TDA2822 episode has had me hurting. It is time we identified some long term candidates for RF power.? - f
On 15 Mar 2018 7:46 am, "KD8CGH" < rkayakr@...> wrote: Also ordered 6 while having a leisurely beer to pass the time between screens.
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An all band SDR using a faster processor? Hi Hi
M
On Thu, 15 Mar 2018 at 3:31 PM, Ashhar Farhan < farhanbox@...> wrote: I am trying to find transistors for our future work. The TDA2822 episode has had me hurting. It is time we identified some long term candidates for RF power.? - f
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More like a multiband vhf... but it is not about any particular project. Radio community has inertia with favourite devices. While subsitutes are possible at low power levels, the devices are fewer for our purpose on HF at 12v. It looka like generics like the IRF510 (which too is No longer manufactured by IRF) are givong away to devices with lower voltages, microwave responses and they are manufacturer specific. - f
On 15 Mar 2018 8:34 am, "Mike Woods" < mhwoods@...> wrote: An all band SDR using a faster processor? Hi Hi
M On Thu, 15 Mar 2018 at 3:31 PM, Ashhar Farhan < farhanbox@...> wrote: I am trying to find transistors for our future work. The TDA2822 episode has had me hurting. It is time we identified some long term candidates for RF power.? - f
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Yes - challenges sourcing Generic parts seems to be emerging.
I like the VHF multiband idea - and this may tie in with your Narrowband FM mod suggestion ... on the Raduino output!? But somewhere along the way you mentioned experiments with an SDR design as well ...
Mike
On Thu, 15 Mar 2018 at 4:20 PM, Ashhar Farhan < farhanbox@...> wrote: More like a multiband vhf... but it is not about any particular project. Radio community has inertia with favourite devices. While subsitutes are possible at low power levels, the devices are fewer for our purpose on HF at 12v. It looka like generics like the IRF510 (which too is No longer manufactured by IRF) are givong away to devices with lower voltages, microwave responses and they are manufacturer specific. - f
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The IRF530 seems to be a very good drop-in replacement for the IRF510.
It has higher power capability with similar specs otherwise. Vdss=100V Id=17A Rds(on)=90mohm.
Mouser carries them in stock (5,551 in stock) 942-IRF530NPBF by Infineon.
(10,36 in stock at $1.07) 844-IRF530PBF by Vishay.
Made by Vishay Siliconix, Infineon,ON Semiconductor, STMicroelectronics.
Available in TO-220-3 and TO-252-3 packages for about $0.90 each.
Another alternative is the MTP3055E for less than $1.00 from Digipart.com.? It's good for up to 30W at 10M.
Ron W7HD
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Must have restocked!
At 15/03/2018, you wrote:
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I am confused.?? Looking at
this page:? ?
RF Parts still lists this as available.
Marco - Kg5PRT
On Wed, Mar 14, 2018 at 2:45 PM, Ashhar Farhan
<farhanbox@...>
wrote:
- Does anyone have news of this? RF Parts is no longer stocking
RD16HHF1 and they have marked RD15HVF1 as EOL. where does that leave us
all?
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A good way to compare switcher FET's for how hard it will be
to drive them at RF frequencies is the total gate charge in nano-Coulombs.
IRF510:? 8.3 nC
IRF530;? 26 nC
MTP3055E: 15 nC
The uBitx driver has trouble with the 8.3 nC of the IRF510's at 30mhz.
Good luck with that IRF530.
And the MTP3055E won't be particularly easy.
The IRF510 is very easy to get, Vishay is building all we could ever want.
The WA2EBY amp with IRF510's works fine from 160m-10m.
My LT-Spice? simulation showed the WA2EBY amp
to be much better behaved than the final on the uBitx.
But we need a better way to drive it our IRF510's.
Jerry, KE7ER
On Wed, Mar 14, 2018 at 09:40 pm, w7hd.rh wrote:
The IRF530 seems to be a very good drop-in replacement for the IRF510.
It has higher power capability with similar specs otherwise. Vdss=100V Id=17A Rds(on)=90mohm.
Mouser carries them in stock (5,551 in stock) 942-IRF530NPBF by Infineon.
(10,36 in stock at $1.07) 844-IRF530PBF by Vishay.
Made by Vishay Siliconix, Infineon,ON Semiconductor, STMicroelectronics.
Available in TO-220-3 and TO-252-3 packages for about $0.90 each.
Another alternative is the MTP3055E for less than $1.00 from Digipart.com.? It's good for up to 30W at 10M.
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Why not 2SC2078??? ?Classic design, cheaper ?and the same pinout as IRF.
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Or any NPN Transistor for that matter?? BD139s were used in other transmitters.? HG Semiconductor makes 2sc2078s, 2sc1969s, 2sc2312s, MRF477, & other obsolete rf transistors.? I have a few of the listed and they have all worked well for 10 & 11 meter equipment.? RF Parts is even selling HG components under their house brand. I have used all of the above listed parts and have not received a bad part, yet.? I buy them directly from HG.? The parts are reasonably priced and I usually have them in a couple of weeks from China. Just a suggestion & my personal experience.
Marco - KG5PRT?
On Mar 15, 2018 3:20 AM, "Ovidiu Baluta via Groups.Io" <yo7lti= [email protected]> wrote: Why not 2SC2078???? Classic design, cheaper ?and the same pinout as IRF.
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I just ordered some ?rd16hhf1 frrom RFparts ,on 2nd page of RD devices below the listing.
73 Dennis
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On 3/14/2018 7:31 PM, Ashhar Farhan
wrote:
I am trying to find transistors for our future
work. The TDA2822 episode has had me hurting. It is time we
identified some long term candidates for RF power.?
- f
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
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RD series are still available.? Local suppliers may be the issue but here in USA its widely
available.? They work ok for 12V only designs.
Regarding IRF530, it can be used and does work at 30mhz but impedance matching
is harder due to the high input capacitance compared to the IRF510.? ?I have driven a
IRF530 at 6M, nice 35w output at 28V but the input matching was 6M only.? Like most
of the 100V mosfets they work much better with higher applied voltages on the drain.?
Allison
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I seem to recall the IRF-520 being the closest IRF sub for the IRF-510. Never tried it tho. Last time I ordered 510s I also ordered 520s just in case.
Vince.
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On 03/15/2018 12:25 PM, ajparent1 wrote: RD series are still available. Local suppliers may be the issue but
here in USA its widely
available. They work ok for 12V only designs.
Regarding IRF530, it can be used and does work at 30mhz but impedance
matching
is harder due to the high input capacitance compared to the IRF510. I
have driven a
IRF530 at 6M, nice 35w output at 28V but the input matching was 6M
only. Like most
of the 100V mosfets they work much better with higher applied voltages
on the drain.
Allison
--
Michigan VHF Corp.
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Nick VK4PP
K9HZ
Bob Benedict, KD8CGH
Raj vu2zap