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tech / sci.electronics.design / interesting eval board

SubjectAuthor
* interesting eval boardjlarkin
+* Re: interesting eval boardJasen Betts
|`* Re: interesting eval boardLasse Langwadt Christensen
| `- Re: interesting eval boardJohn Larkin
`* Re: interesting eval boardGerhard Hoffmann
 +- Re: interesting eval boardLasse Langwadt Christensen
 +* Re: interesting eval boardJasen Betts
 |`- Re: interesting eval boardGerhard Hoffmann
 +- Re: interesting eval boardPhil Hobbs
 `- Re: interesting eval boardClifford Heath

1
interesting eval board

<uo9udgtp29q2vsuivvt9uimnea8lnfi01u@4ax.com>

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From: jlar...@highlandsniptechnology.com
Newsgroups: sci.electronics.design
Subject: interesting eval board
Date: Fri, 02 Jul 2021 07:54:12 -0700
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 by: jlar...@highlandsniptechnology.com - Fri, 2 Jul 2021 14:54 UTC

https://www.dropbox.com/s/wcvv3p98zga33w1/117494-HMC659LC5.webp?raw=1

Looks like a very thin board stuck to a machined block, with the
edge-launch SMAs straddling both.

There's no provision for a main power supply, so they must expect a
bias tee. And maybe a DC block on the input.

--

John Larkin Highland Technology, Inc

The best designs are necessarily accidental.

Re: interesting eval board

<sbo1u1$jc6$1@gonzo.revmaps.no-ip.org>

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From: use...@revmaps.no-ip.org (Jasen Betts)
Newsgroups: sci.electronics.design
Subject: Re: interesting eval board
Organization: JJ's own news server
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 by: Jasen Betts - Fri, 2 Jul 2021 21:54 UTC

On 2021-07-02, jlarkin@highlandsniptechnology.com <jlarkin@highlandsniptechnology.com> wrote:
> https://www.dropbox.com/s/wcvv3p98zga33w1/117494-HMC659LC5.webp?raw=1
>
> Looks like a very thin board stuck to a machined block, with the
> edge-launch SMAs straddling both.
>
> There's no provision for a main power supply, so they must expect a
> bias tee. And maybe a DC block on the input.

I see a bunch of pin headers for the power supply.

--
Jasen.

Re: interesting eval board

<fa718cd6-9e1f-4a5c-9901-86eb1b885f5fn@googlegroups.com>

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Subject: Re: interesting eval board
From: langw...@fonz.dk (Lasse Langwadt Christensen)
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 by: Lasse Langwadt Chris - Fri, 2 Jul 2021 22:09 UTC

lørdag den 3. juli 2021 kl. 00.00.58 UTC+2 skrev Jasen Betts:
> On 2021-07-02, jla...@highlandsniptechnology.com <jla...@highlandsniptechnology.com> wrote:
> > https://www.dropbox.com/s/wcvv3p98zga33w1/117494-HMC659LC5.webp?raw=1
> >
> > Looks like a very thin board stuck to a machined block, with the
> > edge-launch SMAs straddling both.
> >
> > There's no provision for a main power supply, so they must expect a
> > bias tee. And maybe a DC block on the input.
> I see a bunch of pin headers for the power supply.
>

those are for gate control, power supply goes on the output,

https://www.analog.com/media/en/technical-documentation/data-sheets/hmc659.pdf

Re: interesting eval board

<sbo58c$2bq$1@solani.org>

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From: dk4...@arcor.de (Gerhard Hoffmann)
Newsgroups: sci.electronics.design
Subject: Re: interesting eval board
Date: Sat, 3 Jul 2021 00:50:52 +0200
Message-ID: <sbo58c$2bq$1@solani.org>
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 by: Gerhard Hoffmann - Fri, 2 Jul 2021 22:50 UTC

Am 02.07.21 um 16:54 schrieb jlarkin@highlandsniptechnology.com:
> https://www.dropbox.com/s/wcvv3p98zga33w1/117494-HMC659LC5.webp?raw=1
>
> Looks like a very thin board stuck to a machined block, with the
> edge-launch SMAs straddling both.
>
> There's no provision for a main power supply, so they must expect a
> bias tee. And maybe a DC block on the input.

I can't find anything to decode this .webp. Even Gimp that claims
it can handle/edit .webp complains for bad content.

The output power of that thing isn't bad, but an output bias tee
and probably input C do not support the "from DC" assertion.

If you can live with a HMC451, I just got a board with a test
structure from JLCpcb. Yes, FR4, but on the 2 mm from chip to SMA
there won't happen much but a little bit of attenuation.

Turn around time starts to get interesting, less than a week
from Gerber upload to postwoman ringing in smalltown, .de

Gerhard

Re: interesting eval board

<d5eb59e7-0743-41e7-81bf-887f0fda31a9n@googlegroups.com>

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Subject: Re: interesting eval board
From: langw...@fonz.dk (Lasse Langwadt Christensen)
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 by: Lasse Langwadt Chris - Fri, 2 Jul 2021 22:57 UTC

lørdag den 3. juli 2021 kl. 00.50.58 UTC+2 skrev Gerhard Hoffmann:
> Am 02.07.21 um 16:54 schrieb jla...@highlandsniptechnology.com:
> > https://www.dropbox.com/s/wcvv3p98zga33w1/117494-HMC659LC5.webp?raw=1
> >
> > Looks like a very thin board stuck to a machined block, with the
> > edge-launch SMAs straddling both.
> >
> > There's no provision for a main power supply, so they must expect a
> > bias tee. And maybe a DC block on the input.
> I can't find anything to decode this .webp. Even Gimp that claims
> it can handle/edit .webp complains for bad content.
>

here it just opens in firefox,

anyway, it this one https://media.digikey.com/Photos/Hittite%20Microwave%20Photos/117494-HMC659LC5.jpg

Re: interesting eval board

<sbo6m8$8cf$2@gonzo.revmaps.no-ip.org>

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From: use...@revmaps.no-ip.org (Jasen Betts)
Newsgroups: sci.electronics.design
Subject: Re: interesting eval board
Organization: JJ's own news server
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 by: Jasen Betts - Fri, 2 Jul 2021 23:15 UTC

On 2021-07-02, Gerhard Hoffmann <dk4xp@arcor.de> wrote:
> Am 02.07.21 um 16:54 schrieb jlarkin@highlandsniptechnology.com:
>> https://www.dropbox.com/s/wcvv3p98zga33w1/117494-HMC659LC5.webp?raw=1
>>
>> Looks like a very thin board stuck to a machined block, with the
>> edge-launch SMAs straddling both.
>>
>> There's no provision for a main power supply, so they must expect a
>> bias tee. And maybe a DC block on the input.
>
> I can't find anything to decode this .webp. Even Gimp that claims
> it can handle/edit .webp complains for bad content.

dropbox is serving it with the wrong media type header,
strip of the "?raw=1" and it opens in the wrapped preview page OK.

--
Jasen.

Re: interesting eval board

<d61fede9-7fa4-63d8-e2d1-a94251c5c3b8@electrooptical.net>

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Subject: Re: interesting eval board
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From: pcdhSpam...@electrooptical.net (Phil Hobbs)
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 by: Phil Hobbs - Fri, 2 Jul 2021 23:52 UTC

Gerhard Hoffmann wrote:
> Am 02.07.21 um 16:54 schrieb jlarkin@highlandsniptechnology.com:
>> https://www.dropbox.com/s/wcvv3p98zga33w1/117494-HMC659LC5.webp?raw=1
>>
>> Looks like a very thin board stuck to a machined block, with the
>> edge-launch SMAs straddling both.
>>
>> There's no provision for a main power supply, so they must expect a
>> bias tee. And maybe a DC block on the input.
>
> I can't find anything to decode this .webp. Even Gimp that claims
> it can handle/edit .webp complains for bad content.
>
> The output power of that thing isn't bad, but an output bias tee
> and probably input C do not support the "from DC" assertion.
>
> If you can live with a HMC451, I just got a board with a test
> structure from JLCpcb. Yes, FR4, but on the 2 mm from chip to SMA
> there won't happen much but a little bit of attenuation.
>
> Turn around time starts to get interesting, less than a week
> from Gerber upload to postwoman ringing in smalltown, .de
>
> Gerhard

Gimp 2.10.24 on Fedora worked for me.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

Re: interesting eval board

<c1dvdg1gpk5nhi24srv5q9vnu58ej7fnt8@4ax.com>

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NNTP-Posting-Date: Fri, 02 Jul 2021 19:54:37 -0500
From: jlar...@highland_atwork_technology.com (John Larkin)
Newsgroups: sci.electronics.design
Subject: Re: interesting eval board
Date: Fri, 02 Jul 2021 17:54:37 -0700
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 by: John Larkin - Sat, 3 Jul 2021 00:54 UTC

On Fri, 2 Jul 2021 15:09:53 -0700 (PDT), Lasse Langwadt Christensen
<langwadt@fonz.dk> wrote:

>lørdag den 3. juli 2021 kl. 00.00.58 UTC+2 skrev Jasen Betts:
>> On 2021-07-02, jla...@highlandsniptechnology.com <jla...@highlandsniptechnology.com> wrote:
>> > https://www.dropbox.com/s/wcvv3p98zga33w1/117494-HMC659LC5.webp?raw=1
>> >
>> > Looks like a very thin board stuck to a machined block, with the
>> > edge-launch SMAs straddling both.
>> >
>> > There's no provision for a main power supply, so they must expect a
>> > bias tee. And maybe a DC block on the input.
>> I see a bunch of pin headers for the power supply.
>>
>
>those are for gate control, power supply goes on the output,
>
>https://www.analog.com/media/en/technical-documentation/data-sheets/hmc659.pdf

Get them wrong and pony up $350 for a new chip, or $750 for a new eval
board.

We have pretty fancy sequencers and limiters and thermistors and stuff
on our boards.

I have one of these on a board, with a 20 GHz MMIC as a preamp.
Composite GBW is about 1 THz.

Re: interesting eval board

<168e22a4f58e4068$1$2112880$6edd646a@news.thecubenet.com>

  copy mid

https://www.novabbs.com/tech/article-flat.php?id=66495&group=sci.electronics.design#66495

  copy link   Newsgroups: sci.electronics.design
Subject: Re: interesting eval board
Newsgroups: sci.electronics.design
References: <uo9udgtp29q2vsuivvt9uimnea8lnfi01u@4ax.com> <sbo58c$2bq$1@solani.org>
From: no.s...@please.net (Clifford Heath)
Date: Sat, 3 Jul 2021 11:10:04 +1000
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Path: i2pn2.org!i2pn.org!weretis.net!feeder8.news.weretis.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed8.news.xs4all.nl!tr3.eu1.usenetexpress.com!feeder.usenetexpress.com!tr1.iad1.usenetexpress.com!2a07:8080:119:fe::41.MISMATCH!news.thecubenet.com!not-for-mail
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 by: Clifford Heath - Sat, 3 Jul 2021 01:10 UTC

On 3/7/21 8:50 am, Gerhard Hoffmann wrote:
> Am 02.07.21 um 16:54 schrieb jlarkin@highlandsniptechnology.com:
>> https://www.dropbox.com/s/wcvv3p98zga33w1/117494-HMC659LC5.webp?raw=1
>>
>> Looks like a very thin board stuck to a machined block, with the
>> edge-launch SMAs straddling both.
>>
>> There's no provision for a main power supply, so they must expect a
>> bias tee. And maybe a DC block on the input.
>
> I can't find anything to decode this .webp. Even Gimp that claims
> it can handle/edit .webp complains for bad content.

The definitive WEBP tools are here:
<https://developers.google.com/speed/webp/docs/precompiled>
You probably need to update your Gimp.

WEBP images can be lossy (ala JPG) or lossless (ala PNG) and both
formats support transparency (JPG doesn't). They're supposed to be 25%
smaller than equivalent PNG and JPG files.

Clifford Heath

Re: interesting eval board

<sbp9d7$hl9$1@solani.org>

  copy mid

https://www.novabbs.com/tech/article-flat.php?id=66512&group=sci.electronics.design#66512

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From: dk4...@arcor.de (Gerhard Hoffmann)
Newsgroups: sci.electronics.design
Subject: Re: interesting eval board
Date: Sat, 3 Jul 2021 11:07:51 +0200
Message-ID: <sbp9d7$hl9$1@solani.org>
References: <uo9udgtp29q2vsuivvt9uimnea8lnfi01u@4ax.com>
<sbo58c$2bq$1@solani.org> <sbo6m8$8cf$2@gonzo.revmaps.no-ip.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
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logging-data="18089"; mail-complaints-to="abuse@news.solani.org"
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101
Thunderbird/68.10.0
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In-Reply-To: <sbo6m8$8cf$2@gonzo.revmaps.no-ip.org>
 by: Gerhard Hoffmann - Sat, 3 Jul 2021 09:07 UTC

Am 03.07.21 um 01:15 schrieb Jasen Betts:

> dropbox is serving it with the wrong media type header,
> strip of the "?raw=1" and it opens in the wrapped preview page OK.

Yes, that's it!

Gerhard

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