Bosco
@BoscoMac
Followers
2,278
Following
1,025
Media
1,015
Statuses
4,817
science, space, vintage computers, electronics, open-source, linux & unix, nerd, software & database developer iTelex 338805 #37c3 @BoscoLab @social .tchncs.de
Germany
Joined December 2008
Don't wanna be here?
Send us removal request.
Explore trending content on Musk Viewer
برشلونة
• 782712 Tweets
BRICS
• 573078 Tweets
John Kelly
• 275223 Tweets
Trump is Hitler
• 249123 Tweets
Bayern
• 199450 Tweets
#tusaş
• 139496 Tweets
Raphinha
• 93178 Tweets
Peñarol
• 72067 Tweets
Megan
• 66195 Tweets
Flick
• 44069 Tweets
Casado
• 41087 Tweets
Lamine
• 31080 Tweets
Lewandowski
• 28015 Tweets
Fermin
• 27941 Tweets
Hatch Act
• 21299 Tweets
Recreio
• 21267 Tweets
Pedri
• 20621 Tweets
Varela
• 20601 Tweets
INBA
• 20353 Tweets
Nunez
• 20329 Tweets
Brest
• 19072 Tweets
Neuer
• 15702 Tweets
Harry Kane
• 12987 Tweets
البايرن
• 11209 Tweets
Kompany
• 10378 Tweets
Fire in the lab.
Luckily I have smoke detectors in the house. I was able to put out the fire quickly! A lithium polymer battery exploded and caught fire. I will no longer use LiPo batteries.
The battery was new and not connected.
71
73
715
Today I finally found some time to build the second frame for the HP measuring devices. I think the result turned out quite well. The frame is open and all devices get enough air.
47
69
701
I ordered a used crystal oscillator from China. It was simply cut from a PCB. I suspect it hasn't been tested. 😁
43
20
363
New and originally packed by Sun Microsystems! 😻 Sun Ray 2
Should I open it? 🙈😎
24
21
327
Yes!
The Sun Ray server is set up successfully and the Sun Ray 2 thin client will automatically log in to the Sun V240 server.
#sunmicrosystems
#solaris
#solaris10
#sunos
#sunray
10
23
270
HP 8757C scalar network analyzer, HP 8350B sweep oscillator and HP 7470A Plotter in combination to measure an LP filter. Plotters are simply beautiful! 😁
10
28
262
Compare a few filter measurements between HP 8753B and R&S ZVRE Vector Network Analyzer. I love HP measuring devices.
4
22
201
My HP85B finally has an HP 7470A Potter. A beauty! 😍 First test with the space shuttle was very good. I am amazed by the plot quality. The paper transport rollers must be replaced.
11
19
199
The first 256QAM signal is simulated with the Rohde & Schwarz AMIQ02. Displayed via the I/Q outputs to the Agilent 54832B and then on the HP 8981A Vector modulation analyzer.
2
25
197
New to my collection HP 8753A Network Analyzer 3.0 Ghz. Repaired the power supply, adjusted the analog display driver and the first test was ok, but the phase lock was lost.
6
14
194
The beautiful HP 9872C Plotter on the HP 8568B Spectrum Analyzer.
😍 so beautiful
6
26
191
After successfully repairing the SPARCstation 4, boot Solaris 8 from cdrom. I still have to fix the NVRAM.
#sunmicrosystems
#suntember
#solais
#sparcstation
16
12
194
My first try to build a filter. I still need the coils. I'm experimenting with the HP 8753A Network Analyzer.
6
15
184
I built a new environmental measuring station with Bosch BME 280 and MightyOhm Geiger counter. The station is intended to replace my previous measuring station. The new station has been greatly simplified and only runs with ESP32. I'm just starting the outdoor testing phase.
10
11
183
Finally repaired!
The HP 54520A oscilloscope is back in its place. All capacities replaced. The old ones go in the box for broken vintage electronics.
That smell. 😂
3
10
177
A small repair of a Cisco router. On this occasion I was able to try out the HP 6038A System power supply.
0
25
172
I'm testing some SMA cables with the HP 8757C Scalar Network Analyzer and HP 8341B Synthesized Sweeper. The results are documented on the HP 7470A Plotter.
HP forever! 😍
6
17
176
These HP displays are older but beautiful. Very sharp and bright image on the HP 1332A. The HP 1340A has a certain sluggishness when building up an image.
Who also has such displays and what are they used for?
11
14
172
Massive shipping damage to my Sun SPARCstation 4 ☹️ and the monitor too. 😭
#sunmicrosystems
#suntember
#sparcstation
33
10
164
The Sun Ray 2 is original with Sun Microsystems firmware without Oracle logo! 😎👌
5
16
161
A few attempts with the HP 8753B Vector Network Analyzer and the HP 9872C Plotter. The VNA struggles when 4 makers are active and the plotter has to be controlled at the same time. 😁
Does the HP 8753 have a 68k CPU?
3
14
154
An attempt to read the RTTY messages decoded by the R&S GA 082 with the HP 4951C protocol analyzer. The RTTY signal is from the German weather service.
7
20
153
I use this Wandel & Goltermann Level Meter SPM-19 as a sideband receiver for the RTTY signals from the DWD German weather service. The RTTY signal goes into the Rohde & Schwarz telegraphy analyzer GA082. From there via a serial interface to the HP 4952A protocol analyzer.
9
25
151
Checking an Agilent directional coupler 773D 2-18 GHz with a HP 8757C and HP 8341B. Output the result on a HP 9872C plotter.
2
11
152
The Rohde & Schwarz I/Q modulation generator AMIQ02 is alive again. I was able to save the OS and the old hard drive and clone it to a CF card.
The AMIQ can, among other things, quadrature amplitude modulation. It is controlled via WinIQSIM.
An interesting device!
#hp8981A
2
13
148
When you open an HP 3310B function generator you get a wonderful smell of vintage electronics. It smells so good! 🤤
17
13
150
Willy the lab cat examines the HP 7470A plotter. Plotting a monitor signal from the HP 8568B spectrum analyzer.
6
18
145
Calibration tested on the HP 8753B. Then a few bandpass filters measured. Then a plot with the HP 9872C.
This is a beautiful evening 😁
8
19
146
Evening relaxation at the HP 9872C plotter. A multicolor plot from HP 8568B.
8
14
140
The first test with a HP 8972C plotter (H. Potter) 😉 The sound of the mechanics is very nice. It can be supplied in eight different colors and up to DIN A3 panels.
11
11
141
The Rohde & Schwarz ZVRE Vector Network Analyzer also works with HP-IB devices. This makes it possible to use an HP plotter such as 7470A to be used on the VNA. Personally, I think the HPGL results from HP VNA are a little better.
2
19
138
Repair time for the SUN SPARCstation 4 after shipping damage. I it looks good. Time for a test. 🫣
#sunmicrosystems
#sparcstation
#sparc
4
12
142
I haven't been in the lab for a few days, and now I'm being flooded with system messages. 😁
6
6
138
I finally built myself a high-quality cable for calibration. Each cable is shielded and has high-quality connectors.
Unfortunately the PDVSmini does not have an extra shield connector. 🤓
5
11
131
Today I cleaned up and organized the workplace for soldering. A new place for the HP 54520A oscilloscope.
8
13
131
HP 8662A repair
A resistor is broken on the 7A4A board, I can't find a circuit diagram and can't identify the resistor.
Who can help?
18
10
127
HP 4952A protocol analyzer with VT100 simulator. I have a modem connected with Zimodem firmware. The terminal is running. 😁
4
12
117
Troubleshooting the HP 5334A Universal Counter. The internal highly stable crystal oscillator drifts after 2h. Monitor all voltages on the power supply.
10
5
125
Today on the bench, an HP 54100D Digitizing Oscilloscope with 1Ghz bandwidth and active probes. An interesting device with 68k CPU and a very nice display. Using the menus is a bit difficult.
7
7
120
I have a problem with the GNSS disciplined oscillator. I have a GPS look but the alarm LED lights up and my 10 MHz reference signal is not correct. I dipped the internal OCXO to test but without success.
Does somebody has any idea?
24
7
116
While I was repairing the HP 3325B, the HP 54520A oscilloscope died.
Bad ☹️
This will be a repair within the repair.
The lab now smells like a defective power supply. 🤢
10
8
114
Setting the hight stability time base with EFC on a HP 8644A synthesized signal generator. I measure the frequency with an HP 5334A and control the measurement with an HP85B. The measurement output is more accurate by one digit after the come on the HP85B display.
4
7
113
The HP 8481B power sensor can measure 1mW to 25W without an offset on the HP 438A power meter and can do so up to 18 GHz. The attenuator is part of the power sensor system.
I will carry out a few tests.
HP Love Forever 😁
2
7
114
A nice combination of Rohde & Schwarz ESH 3 ESVP and GA 082 with FSK Analyzer and German weather service.
5
18
108
Willy the cat and I test the HP7470A plotter emulator on the HP8568B via HP-IB.
2
16
109
Started developing a program for the HP85 to log long-term measurements with HP 3478A or other HP multimeters.
I'm trying out many features to make the program compatible with many devices.
11
10
109
I have an HP 8662A signal generator with a broken power supply. After the first inspection I found the obvious damage, I hope it is the only one. Two capacitors in the high voltage area are broken.
7
12
108
That is confusing. I query the HP-IB address 13 from the 5334A counter and also get an answer from the 3455A voltmeter that runs at HP-IB address 10.
Who knows the problem?
9
8
107
The HP 11666A Reflectometer Bridge works very well with the HP 8757C. It is a power splitter, SWR bridge and two detectors in one.
Absolutely fantastic! 😁
2
10
100
HP 9000 310
Suddenly the HP hard disk in the HP 9153C repaired itself and an initialization was started. I am trying to install the HP Basic 5.1 on the hard drive.
5
4
99
Upgrading an HP 5335A universal counter with an HP 10544A crystal oscillator. After installing the oscillator, a jumper must be removed. A first test is successful, the oscillator warms up.
3
7
100
Absolutely fantastic 😁 the PDVS2mini from
@IanSJohnston
It helps me to fully calibrate the HP 3455A and all others like HP 3456A HP 3478A HP 3457A HP 34401A.
4
8
98
After repairing the HP 8562A spectrum analyzer and replacing the CRT driver board, I did a quick test with the HP 9872C plotter.
Just for fun 🤓
3
8
97
The HP 5060-0329 encoder is more complicated than I thought.
Does anyone have schematics for this?
#hp6034a
#hppowersupply
6
14
95
The HP 8341B is now in the rack and connected to the HP 8757C. The sweeper is very loud. I need to replace the fan. It sounds like an engine. 😁
5
7
94
A new HP 7475A plotter! 😱 Oh my god new! New old stock and works fine! 😍Crazy that something like this still exists.
9
9
94
0
5
37
Good morning from a Tektronix 7854 oscilloscope with 7S11 sampling unit and 7T11 sampling sweep unit. 😎
Who of you uses a 7S11 and a 7T11 also in the lab?
7
5
89
I'm looking for a replacement bulb (5V) for the HP 59303A digital to analog converter in the front panel. Are there any alternatives? Who can help?
12
9
89
Formatting new disks on Sun Fire V240 for a Solaris 10 ZFS installation takes hours. 🙈
#solaris10
#sunmicrosystems
#v240
#sunfirev240
4
6
91
That's something for
@curious_marc
and
@kenshirriff
Moon landing:
Lunar lander with a HP9000 310 😎
5
8
89
I have received this beautiful HP 9000 310 computer. The hard drive spins up but won't boot. Trying to boot BASIC from floppy works. But the disc 3 has an error and it stopped. I'm trying to create new disks. I have to try to create them with an HD floppy disk drive.
5
10
88
I discover the HP 5370B Universal Time Interval Counter. A transistor in the power supply was over 80 °C. This temperature is a bit too high. It is a Motorola with the HP part number 1853-0411. Is there an alternative to this transistor? I haven't found anything on the internet.
15
10
87
I see some spikes on the HP 8593E Spectrum Analyzer and am trying to find the source. It comes and goes.
10
10
89
Another HP 3325B synthesizer / function generator for repair. Two problems number one: the power switch only turns off the fan. The device itself stays on. Problem two: Fail 021 amplitude too high when calibrating.
3
8
85
