Search found 1857 matches

by VK4GHZ
Sat Apr 04, 2020 10:45 am
Forum: Transceivers, Transmitters & Receivers
Topic: Icom IC-9700 users topic
Replies: 165
Views: 44043

Re: Icom IC-9700 users topic

Version 1.23 Update 2020/04/03 Major changes Changes from Version 1.21 • Changed the screen drawing sequence to keep the previous frequency screen layout when exiting from a function displayed in fullscreen. • Fixed an issue where the standby beep may sound approximately two seconds after receiving ...
by VK4GHZ
Tue Mar 31, 2020 4:55 pm
Forum: General Discussion
Topic: eBay anti-gouging and Isopropyl Alcohol rip offs
Replies: 2
Views: 101

eBay anti-gouging and Isopropyl Alcohol rip offs

Too bad if you need some IPA for PCB and general electronics work at the moment. The opportunistic vultures have come out and are flogging IPA for ridiculous amounts right now. Ripoff-merchant.JPG $1450. Free freight. how kind of them. Whereas the normal price for a 20 litre drum is $263 + a small p...
by VK4GHZ
Mon Mar 30, 2020 4:51 pm
Forum: General Discussion
Topic: Car battery warranty with stop/start
Replies: 1
Views: 61

Car battery warranty with stop/start

Replacing the car battery today after 4 years, so that was a good run!!! (It was a Repco branded N70ZZ4WD if you were wondering, which is a re-badged Century) 20200330_1559_1200.jpg The new battery, a Century N70ZZXMF, has a warranty condition I hadn't noticed before on car batteries. 20200330_15584...
by VK4GHZ
Mon Mar 23, 2020 8:29 pm
Forum: Ancillary, Test Equipment, Components & Parts
Topic: 10 Hints to Minimize Noise Figure Uncertainties
Replies: 1
Views: 105

10 Hints to Minimize Noise Figure Uncertainties

Received from Keysight today, and FYI. " Noise figure—a fundamental RF measurement—is critical for assessing the receiver's ability to detect weak, incoming signals in the presence of self-generated noise. Reducing noise figure begins with a solid understanding of the uncertainties in your component...
by VK4GHZ
Mon Mar 23, 2020 4:44 pm
Forum: Transceivers, Transmitters & Receivers
Topic: IC-410PRO AF out on mic socket
Replies: 2
Views: 171

Re: IC-410PRO AF out on mic socket

Hi Rob I actually started looking at the Accessory socket on the main board when I learnt that the EPTT signal on that connector could be configured (with the normal consumer version of CS-410 #01) to get around the TOT (Time Out Timer). As it turned out, I got a copy of the Dealer version of the pr...
by VK4GHZ
Sat Mar 21, 2020 9:35 am
Forum: Transceivers, Transmitters & Receivers
Topic: IC-410PRO AF out on mic socket
Replies: 2
Views: 171

IC-410PRO AF out on mic socket

An Icom IC-410PRO UHF transceiver is being interfaced via it's RJ-45 microphone connector to a Clear-Com intercom system via a TW-47. Audio Out is required on the RJ-45 mic connector, but; a) It doesn't appear there by default b) the IC-410PRO Service Manual is unobtainium, so try finding the solder...
by VK4GHZ
Mon Mar 16, 2020 8:24 pm
Forum: Ancillary, Test Equipment, Components & Parts
Topic: Learning about a Mixed Signal Oscilloscope (MSO)
Replies: 0
Views: 105

Learning about a Mixed Signal Oscilloscope (MSO)

Another informative read from Keysight (formerly HP, then Agilent) this week. Introduction Today’s embedded designs based on microcontrollers (MCUs), FPGAs, and digital signal processors (DSPs) often include a combination of analog and digital signal content. Design engineers have traditionally used...
by VK4GHZ
Sun Mar 15, 2020 5:33 pm
Forum: PC/Mac Hardware
Topic: USB to Serial Converters
Replies: 21
Views: 9067

Re: USB to Serial Converters

After a brief search I found this: http://www.vexforum.com/showthread.php?t=77392 . I followed the links in the third message, installed the older driver and it now works fine :D Thank God for Forums! Thank you Iain for the link you referred to. http://content.vexrobotics.com/downloads/get.php?f=WI...
by VK4GHZ
Thu Feb 27, 2020 4:26 pm
Forum: Satellites & Balloons
Topic: Sattrak 3 controller
Replies: 4
Views: 365

Re: Sattrak 3 controller

Have you got a copy of this Nigel?

This extract is from 73 May 1989.

Sat Trak III.pdf
(5.37 MiB) Downloaded 32 times
by VK4GHZ
Fri Feb 21, 2020 7:27 am
Forum: 1296, Microwaves and Opto
Topic: 23-on-23 + MAD: Sunday February 23, 2020
Replies: 15
Views: 912

Re: 23-on-23 + MAD: Sunday February 23, 2020

Given the uncertainty in that very few have bothered to advise about their activity, }:[ I have decided to do other things instead. It would consume a significant part of tomorrow in dragging the [unused for 6 years] gear out, blowing the dust off, checking everything and reaquainting myself with it...
by VK4GHZ
Thu Feb 20, 2020 12:29 pm
Forum: General Discussion
Topic: What's on your Workbench?
Replies: 648
Views: 106863

Re: What's on your Workbench? Repairing resistive touch screens

I haven't tried this myself, yet, but if you have a 'dicky' resistive touch screen, this could be worth a shot. Note that a hot air re-work station is being used. These are essentially a fancy heat gun with better control over temperature and air flow rate, and, have various nozzles so that you can ...
by VK4GHZ
Wed Feb 19, 2020 3:00 pm
Forum: 1296, Microwaves and Opto
Topic: New 122GHz World Record
Replies: 1
Views: 161

Re: New 122GHz World Record

A great accomplishment by the operators, especially considering it's a "real" QSO, and not this digital mode stuff, where your computer has a contact on your behalf. :J Cue the comments about CW being the original digital mode, etc. :lol: This video demonstrates the signal levels involved and the re...
by VK4GHZ
Tue Feb 18, 2020 11:16 am
Forum: General Discussion
Topic: What's on your Workbench?
Replies: 648
Views: 106863

Re: What's on your Workbench?

I'll have to think about how to mount it to a tripod since I have a couple of dish options to consider. Tim, keep an eye out for old "Fluid Heads" that pop up on eBay etc. Pan/tilt heads that have reached their end-of-life for professional camera work, but are perfect for parabolic dish aiming. You...
by VK4GHZ
Mon Feb 17, 2020 12:58 pm
Forum: 1296, Microwaves and Opto
Topic: 23-on-23 + MAD: Sunday February 23, 2020
Replies: 15
Views: 912

Re: 23-on-23 + MAD: Sunday February 23, 2020

I believe there was some email list going around to a select few, so some details may be on an invite only basis. :shh: As a gate crasher, I might set up and blow the dust out of the dual-band 5.7 GHz / 10 GHz transverter from the top of the drive way. Those will be the only bands active. Mt Coot-th...
by VK4GHZ
Sun Feb 09, 2020 10:40 am
Forum: Ancillary, Test Equipment, Components & Parts
Topic: Looking for ESA-L1500A manual
Replies: 1
Views: 335

Re: Looking for ESA-L1500A manual

It's an elusive document, Lou.

Assume you have checked KO4BB, which is an excellent resource for manuals.
I see there are a number of documents for the same family.
http://www.ko4bb.com/getsimple/index.ph ... HP_Agilent

Couldn't spot the CLIP though.
by VK4GHZ
Fri Feb 07, 2020 2:03 pm
Forum: 1296, Microwaves and Opto
Topic: Amateur radio astronomers
Replies: 2
Views: 234

Re: Amateur radio astronomers

Absolutely.

I can't quite make out the name on the reflective board used with the horns.
Perma? Products.
by VK4GHZ
Sat Feb 01, 2020 11:13 pm
Forum: Transceivers, Transmitters & Receivers
Topic: Icom IC-9700 users topic
Replies: 165
Views: 44043

Re: Icom IC-9700 users topic

VK1XX Lock board becomes available ~2 weeks.
AUD$80 (inc GST) posted within VK.
+ $4 for Paypal fees, or +$0 if using credit card.
by VK4GHZ
Thu Jan 30, 2020 3:52 pm
Forum: Ancillary, Test Equipment, Components & Parts
Topic: Fixing Trimble Thunderbolt -55° Temp ERROR!
Replies: 1
Views: 391

Fixing Trimble Thunderbolt -55° Temp ERROR!

If your Trimble Thunderbolt GPSDO is indicating a temperature of -55° then it's very easy to fix.




https://www.youtube.com/watch?v=6KPlS2XOo-A
by VK4GHZ
Sun Jan 26, 2020 10:10 am
Forum: Ancillary, Test Equipment, Components & Parts
Topic: HP Agilent 53131A 53132A 53181A 12.4 GHz option
Replies: 4
Views: 564

Re: HP Agilent 53131A 53132A 53181A 12.4 GHz option

Razvan has officially launched his 10 GHz pre-scaler board to suit the HP Agilent 53131A, 53132A, 53181A family of counters. https://cojotech.com/ HPO-100.JPG An introductory discount of 10% exists right now. As discussed above, this pre-scaler actually works up to 12 GHz. Have already ordered mine!...
by VK4GHZ
Wed Jan 22, 2020 1:32 pm
Forum: Transceivers, Transmitters & Receivers
Topic: Icom IC-9700 users topic
Replies: 165
Views: 44043

Re: Icom IC-9700 users topic

The following information comes from a very brave Chuck, VA7UL, and is shared FYI. - - - Here is some documentation showing the installation of a Leo Bodnar MiniGPS clock entirely inside my 9700 , such that the only things on the rear panel of the radio are an additional SMA antenna connector plus a...