Author Topic: What did you buy today? Post your latest purchase! (Read 3087483 times)

McBryce · « **Reply #1725 on:** July 11, 2016, 09:09:02 am »

Quote from: VK5RC on July 09, 2016, 10:45:05 am

@McBrice , do you have a DC block in there ? (don't ask why I ask!!!!!)

No, these let through DC, however, my SA is a DSA815-TG which can supposedly take up to 50VDC on the inputs, (well above what I will be working with), so it shouldn't be an issue. However, I may build myself a DC block for future use.

Regarding "ruining the SA ports due to mechanical inaccuracy", they will be mounted via a not-so-cheap SMA to N-Type adapter, so they don't have a direct connection to the SA.

McBryce.

VK5RC · « **Reply #1726 on:** July 11, 2016, 09:33:03 am »

That would have saved me a LOT of swearing.

I use the 'savers' on my 3.5 gear.

gamalot · « **Reply #1727 on:** July 12, 2016, 12:39:59 pm »

Yokogawa TA520 Time Interval Analyzer

edy · « **Reply #1728 on:** July 12, 2016, 12:47:33 pm »

Sunding bicycle computer for $9, shipping in, from China. No doubt a P.O.S. but let's see how long it lasts. First thing I'll do once coin cells die is wire up an external AAA supply so I can use rechargeables.

[EDIT: Added video later....]

https://youtu.be/MoOcvsuKzJA

Cervisia · « **Reply #1729 on:** July 12, 2016, 01:59:40 pm »

Optoelectronics Theory & Practice (in the original ~~Klingon~~German)

For those who prefer live electrons over dead trees: https://archive.org/details/OptoelectronicsTheoryPractice

AF6LJ · « **Reply #1730 on:** July 13, 2016, 02:43:01 pm »

Quote from: McBryce on July 11, 2016, 09:09:02 am

Quote from: VK5RC on July 09, 2016, 10:45:05 am
@McBrice , do you have a DC block in there ? (don't ask why I ask!!!!!)

No, these let through DC, however, my SA is a DSA815-TG which can supposedly take up to 50VDC on the inputs, (well above what I will be working with), so it shouldn't be an issue. However, I may build myself a DC block for future use.

Regarding "ruining the SA ports due to mechanical inaccuracy", they will be mounted via a not-so-cheap SMA to N-Type adapter, so they don't have a direct connection to the SA.

McBryce.

You are going to want to keep DC off those attenuators.

TAMHAN · « **Reply #1731 on:** July 13, 2016, 02:47:16 pm »

Quote from: gamalot on July 12, 2016, 12:39:59 pm

Yokogawa TA520 Time Interval Analyzer

Interesting unit. Do you also have a 53310A on hand, for comparison?

McBryce · « **Reply #1732 on:** July 13, 2016, 03:02:29 pm »

Quote from: AF6LJ on July 13, 2016, 02:43:01 pm

Quote from: McBryce on July 11, 2016, 09:09:02 am
Quote from: VK5RC on July 09, 2016, 10:45:05 am
@McBrice , do you have a DC block in there ? (don't ask why I ask!!!!!)

No, these let through DC, however, my SA is a DSA815-TG which can supposedly take up to 50VDC on the inputs, (well above what I will be working with), so it shouldn't be an issue. However, I may build myself a DC block for future use.

Regarding "ruining the SA ports due to mechanical inaccuracy", they will be mounted via a not-so-cheap SMA to N-Type adapter, so they don't have a direct connection to the SA.

McBryce.
You are going to want to keep DC off those attenuators.

The attenuators claim "DC to 3GHz up to 2W" on the label.

McBryce.

AF6LJ · « **Reply #1733 on:** July 13, 2016, 04:51:29 pm »

Pulling the DC down in your circuit under test is a bad idea.

PartialDischarge · « **Reply #1734 on:** July 13, 2016, 06:11:08 pm »

Quote from: gamalot on July 12, 2016, 12:39:59 pm

Yokogawa TA520 Time Interval Analyzer

maybe a silly question but, how does that achieve a 25ps resolution with only 43msps??

FireFlower · « **Reply #1735 on:** July 13, 2016, 08:59:47 pm »

from Europe 48€

willb · « **Reply #1736 on:** July 13, 2016, 10:08:31 pm »

ZM-11/U

VK5RC · « **Reply #1737 on:** July 13, 2016, 10:33:32 pm »

@willb does that have a 'tuning eye' display tube? Looks in pretty good condition.

willb · « **Reply #1738 on:** July 13, 2016, 11:04:29 pm »

It sure does! The photo is from the eBay auction, the seller said it was in working condition, I should have it this Friday!

rstofer · « **Reply #1739 on:** July 14, 2016, 12:53:17 am »

Just released FPGA 'stick':

http://store.digilentinc.com/cmod-a7-breadboardable-artix-7-fpga-module/

I prefer the 35T chip but it costs a little more. Notice the SRAM! That is so much nicer than DDR...

alexanderbrevig · « **Reply #1740 on:** July 14, 2016, 01:18:33 am »

This may be an 'electronics only' section, not sure - but after a long specification process. My custom 10 string guitar build has started!

It will be similar to this one, except green (and other technical small details that's probably not of interest):

The tuning will be ADGBEADGBE, from 27.5Hz to 1661Hz (28th fret on high E string) without any pinch harmonics or trickery! Extended range? Yes

The neck is 31×27.5? fanned frets to help get the appropriate tension across the range.

I. Am. In. Love.

tautech · « **Reply #1741 on:** July 14, 2016, 08:00:39 am »

Siglent SSA3032X 3.2 GHz Spectrum analyzer plus their 6 GHz UKitSSA3X accessories kit.
http://www.siglentamerica.com/prodcut-fjxx.aspx?fjid=1558&id=1546&tid=227&T=2

Now I've gotta learn how to use it.

Fortran · « **Reply #1742 on:** July 14, 2016, 08:15:40 am »

A brand new fully loaded X11 "hot air station"

McBryce · « **Reply #1743 on:** July 14, 2016, 08:23:53 am »

Go on! Just for the fun of it, try removing a BGA chip with that!

McBryce.

Fortran · « **Reply #1744 on:** July 14, 2016, 08:50:43 am »

I suspect there will be enough heat to remove just about anything. Even on multilayer with big groundplanes

Don't think the boards themselves will survive though.

VK5RC · « **Reply #1745 on:** July 14, 2016, 11:34:13 am »

@willb , I still have a 12yo boy feeing about how cool they are !!!!!
@Fortran does it have the oxygen lance aka gas axe? now that is serious fun! (bloody messy though and watch the oxygen disappear)

Fortran · « **Reply #1746 on:** July 14, 2016, 12:22:14 pm »

No only the welding and cutting tips.
I'm getting the gauger though because I need to remove some poor welds that's been covered up by poorer welds on the digger.
It looks like a seriously fun tool.

mathsquid · « **Reply #1747 on:** July 14, 2016, 12:59:08 pm »

Quote from: alexanderbrevig on July 14, 2016, 01:18:33 am

This may be an 'electronics only' section, not sure - but after a long specification process. My custom 10 string guitar build has started!
...
The tuning will be ADGBEADGBE, from 27.5Hz to 1661Hz (28th fret on high E string) without any pinch harmonics or trickery! Extended range? Yes

Do you play that instrument like a guitar or like a chapman stick?

firewalker · « **Reply #1748 on:** July 14, 2016, 02:41:59 pm »

An HM205-3 (free).

Alexander.

Kilrah · « **Reply #1749 on:** July 14, 2016, 04:45:43 pm »

Logic Pro 8, to replace my old Logic 8 that got stolen

Along with some 3.3/5V FTDIs as I had everything in the same bag so didn't have any more of those either, and a couple of ESP8266 modules to ~~play with~~ stay up to date.


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Author Topic: What did you buy today? Post your latest purchase! (Read 3087483 times)

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