Search found 523 matches
- Tue Feb 16, 2021 4:37 pm
- Forum: 144 & 432 MHz
- Topic: Thoughts on a portable dual-band Yagi
- Replies: 2
- Views: 808
Re: Thoughts on a portable dual-band Yagi
Daryl, My only issue with that antenna is that it is attached to the mast at one end - This places considerable off-centre load on you Buddy Pole mast. I would have thought that a dual band where the mast is attached at the balance point of the boom would have been better. Antennas -amplifiers make ...
- Fri Feb 05, 2021 10:51 am
- Forum: Ancillary, Test Equipment, Components & Parts
- Topic: Fukner Rotator voltage
- Replies: 10
- Views: 2544
Re: Fukner Rotator voltage
Alex,
I have sent a pdf file with the information to your yahoo address.
Make sure you read my post from 2013 earlier in this stream.
Cheers
Peter VK3QI
I have sent a pdf file with the information to your yahoo address.
Make sure you read my post from 2013 earlier in this stream.
Cheers
Peter VK3QI
- Wed Oct 21, 2020 9:29 am
- Forum: Transceivers, Transmitters & Receivers
- Topic: Does the Icom IC-705 Drift? Test and Results HERE!
- Replies: 3
- Views: 821
Re: Does the Icom IC-705 Drift? Test and Results HERE!
Roger dodger Hayden,
I guess the key difference between the 705 and the 9700 is the fan and its effect on the various duty cycles.
Let's hope the service manual becomes available soon and we can get an idea of how they do it.
Cheers
Peter VK3QI
I guess the key difference between the 705 and the 9700 is the fan and its effect on the various duty cycles.
Let's hope the service manual becomes available soon and we can get an idea of how they do it.
Cheers
Peter VK3QI
- Tue Oct 20, 2020 1:10 pm
- Forum: Transceivers, Transmitters & Receivers
- Topic: Does the Icom IC-705 Drift? Test and Results HERE!
- Replies: 3
- Views: 821
Re: Does the Icom IC-705 Drift? Test and Results HERE!
Hayden, Your finding does seem to conflict somewhat with the earlier findings from the 7OTC video at the 23:50 minute mark. It would appear that duty cycle differences might be an issue, say, between continuous Digital transmisions, SSB and CW transmissions. Still waiting to find out what master osc...
- Tue Oct 06, 2020 12:37 pm
- Forum: Transceivers, Transmitters & Receivers
- Topic: Icom IC-705, IC-7300 and IC-9700 Waterfall Setup for Weak Signals
- Replies: 2
- Views: 778
Re: Icom IC-705, IC-7300 and IC-9700 Waterfall Setup for Weak Signals
I tried your settings on the IC7610 as well - pretty much the same results, except that VBW is a variable on the main receiver rather than in the settings area. I change the variables every week or so, as I get "bored" with the current settings - a change as good as a holiday, especially i...
- Sun Sep 27, 2020 2:31 pm
- Forum: Ancillary, Test Equipment, Components & Parts
- Topic: The unsung hero of the toolbox
- Replies: 4
- Views: 635
Re: The unsung hero of the toolbox
They do tend to blunt after a while, especially if you are drilling metal without a suitable lubricant, HOWEVER, at the price you pay for a set of 3 (such as the Craftright set) compared with the equivalent cost of a full set of replacement twist drills, you come out way ahead. Definitely something ...
- Fri Apr 03, 2020 3:15 pm
- Forum: 1296, Microwaves and Opto
- Topic: 5.7 GHz transverter - finished (finally)
- Replies: 4
- Views: 957
Re: 5.7 GHz transverter - finished (finally)
Peter,
Looking at your pictures, it appears that you are using about 4 metres of blue jacket RG402 for the TX feed line. Is that correct? Have you considered the loss in that length of cable on the 10watts from the amplifier?
Cheers
Peter VK3QI
Looking at your pictures, it appears that you are using about 4 metres of blue jacket RG402 for the TX feed line. Is that correct? Have you considered the loss in that length of cable on the 10watts from the amplifier?
Cheers
Peter VK3QI
- Wed Jan 22, 2020 11:47 am
- Forum: Ancillary, Test Equipment, Components & Parts
- Topic: HP Agilent 53131A 53132A 53181A 12.4 GHz option
- Replies: 4
- Views: 1324
Re: HP Agilent 53131A 53132A 53181A 12.4 GHz option
Adam, Why not look for a good secondhand HP5350B counter? That will get you to 20GHz. They sometimes come up at auction or where a business has closed down, for quite reasonably comparable prices to the latest offerings from China and Europe. The unit is bulky compared with the more modern units, bu...
- Fri Dec 20, 2019 8:12 am
- Forum: Ancillary, Test Equipment, Components & Parts
- Topic: Kings Generators
- Replies: 14
- Views: 3164
Re: Kings Generators
Compton, Your observation highlights an issue with the "ECO" operation of the Honda generators. When trying to start appliances like an air conditioner, which has a high start current, the Honda needs to be in the operation mode with the "ECO" switch off, so that the engine revs ...
- Wed Dec 18, 2019 9:18 am
- Forum: Ancillary, Test Equipment, Components & Parts
- Topic: Kings Generators
- Replies: 14
- Views: 3164
Re: Kings Generators
Hayden, You ask for specific details about filtering for Honda generators. I own 2 EU10s, 1 EU20 and 1 EU22 and have replaced my first EU20 (circa 2002 with over 1200 hours)- although that generator is still doing service with the VK3KQ/p team. When the Honda generators first came on the scene, myse...
- Tue Nov 26, 2019 4:33 pm
- Forum: 1296, Microwaves and Opto
- Topic: 47GHz 76GHz enthusiasts
- Replies: 4
- Views: 1618
Re: 47GHz 76GHz enthusiasts
Gary,
There was a recording made. I do not have the details, however an email to David VK5KK should find what availability the video will have.
david@vk5kk.com
Cheers
Peter VK3QI
There was a recording made. I do not have the details, however an email to David VK5KK should find what availability the video will have.
david@vk5kk.com
Cheers
Peter VK3QI
- Wed Nov 13, 2019 9:59 am
- Forum: 1296, Microwaves and Opto
- Topic: Inside the RF HamDesign feed
- Replies: 6
- Views: 1731
Re: Inside the RF HamDesign feed
As a long time successful user of RF HAMDESIGN 1/2 Dual Band, 3/5/10 Triband and 1/2/3/5/10 5 band feeds I would like to make a few points. (1) Moisture issues can be alleviated by simply drilling a drain hole in the bottom of the feed. I note the LA boys were using a Gore-Tex plug, no doubt to stop...
- Sat Nov 09, 2019 12:36 pm
- Forum: 1296, Microwaves and Opto
- Topic: 47GHz 76GHz enthusiasts
- Replies: 4
- Views: 1618
47GHz 76GHz enthusiasts
Friday 15th November Meeting with OE amateurs. The following has been circulated - maybe some on the logger forum may have missed it. Microwave Show and Tell We are pleased to welcome Wolfgang OE4WOG and Hans OE2JOM to our monthly clubroom meeting where they will discuss their activities, achievemen...
- Fri Oct 11, 2019 10:08 am
- Forum: Ancillary, Test Equipment, Components & Parts
- Topic: BG7TBL GPSDO (GPS Disciplined Oscillator) and 10 MHz Distribution Amplifier
- Replies: 4
- Views: 2940
Re: BG7TBL GPSDO (GPS Disciplined Oscillator) and 10 MHz Distribution Amplifier
Adam and Hayden, Just to reinforce the information about the warble. I was referring to the BG7 10 Mhz distribution amplifier r with in-built OCXO, NOT the 10 Mhz GPS unit. If you look at the comments that followed that posting, the discussion reverted back to the GPS unit. I have had nothing but gr...
- Wed Sep 04, 2019 11:23 pm
- Forum: Transceivers, Transmitters & Receivers
- Topic: Icom IC-705 new QRP SDR HF-70cm backpack rig (pre-release info)
- Replies: 5
- Views: 3141
Re: Icom IC-705 new QRP SDR HF-70cm backpack rig (pre-release info)
Adam, Spot on regarding the proposed IC-705. I have a couple of 817ND units for various 24 and 47 Ghz transverters and by far the best thing that can be done for an 817 is to add DSP in the form of the BHI units. I have already added the TCXO units. I have often wondered why the 818 upgrade didn't i...
- Wed Sep 04, 2019 11:03 pm
- Forum: 1296, Microwaves and Opto
- Topic: Live stream from REAST - Talking microwaves
- Replies: 2
- Views: 2343
Re: Live stream from REAST - Talking microwaves
FACT CHECK - the 817 weighs 1.17 Kg including the battery but excluding the mike - certainly not 3Kg as claimed in the video.
Peter VK3QI
Peter VK3QI
- Wed Sep 04, 2019 2:19 pm
- Forum: Transceivers, Transmitters & Receivers
- Topic: Icom IC-705 new QRP SDR HF-70cm backpack rig (pre-release info)
- Replies: 5
- Views: 3141
Re: Icom IC-705 new QRP SDR HF-70cm backpack rig (pre-release info)
Nik, I'd be holding off on any judgements until the rig actually sees the light of day sometime in 2020. Not an auspicious start, when it is advertised as an SDR HF-70cm rig (until you read the fine print, where it says that 50, 144 and 432 are actually Hetrodyne conversion down to below 25 Mhz). Al...
- Sun Sep 01, 2019 9:20 am
- Forum: 1296, Microwaves and Opto
- Topic: Antennas for 3.4 GHz
- Replies: 34
- Views: 13063
Re: Antennas for 3.4 GHz
Hatden,
is this what you are looking for?
http://www.w1ghz.org/antbook/conf/WA5VJB_LPA_feed.pdf
Cheers
Peter VK3QI
is this what you are looking for?
http://www.w1ghz.org/antbook/conf/WA5VJB_LPA_feed.pdf
Cheers
Peter VK3QI
- Wed Aug 28, 2019 11:13 pm
- Forum: 1296, Microwaves and Opto
- Topic: 2.4 GHz contact in Southern Tasmania over mountains
- Replies: 9
- Views: 5954
Re: 2.4 GHz contact in Southern Tasmania over mountains
Hayden, There are few tests you can do. (1) rotate the antenna in the horizontal and see what the beam width is (2) see if there are any lobes - these will be evident if the feed is not quite in the correct position (3) move the LP in and out to try and minimise any lobes - anything better than -20d...
- Wed Aug 07, 2019 1:34 am
- Forum: 1296, Microwaves and Opto
- Topic: Antennas for 3.4 GHz
- Replies: 34
- Views: 13063
Re: Antennas for 3.4 GHz
Hayden, You asked about the position of the focal point. If you go with the LP style of antenna, then the following reference is well worth studying. https://www.wa5vjb.com/references/DesigningPCB-LPs.pdf The section on phase centre will determine the position of the LP. Generally, you place the LP ...