Search found 203 matches

by ZL2WHO
Sat Apr 27, 2019 1:31 pm
Forum: General Discussion
Topic: Chat
Replies: 0
Views: 156

Chat

Adam... is it possible to reactivate chat? I for one would use it.

Thanks for the last 10 years effort.

73
Mark.
by ZL2WHO
Mon Apr 15, 2019 5:34 pm
Forum: Silent Keys
Topic: ZL3MF Zl3TIC
Replies: 2
Views: 287

Re: ZL3MF Zl3TIC

Sorry to hear that Ross.
While I have never met him we had a lot in common it seams exchanging many emails over the years.

Here for a good time, not a long time....

Mark
2WHO
by ZL2WHO
Fri Feb 22, 2019 12:54 pm
Forum: 50 MHz
Topic: 40 Mhz beacons/ Band
Replies: 8
Views: 2114

Re: 40 Mhz beacons/ Band

by ZL2WHO
Mon Feb 18, 2019 1:38 pm
Forum: Transceivers, Transmitters & Receivers
Topic: FT-817 DC Input Socket
Replies: 5
Views: 933

Re: FT-817 DC Input Socket

Hi Doug. I haven't encounted your issue but iv never been happy with the DC plug/socket arrangement, presumeably its the same on the 897. The plug and socket have 2 pins neg and 2 pin pos but they dont mate tight so I suspect there is a volt drop across them under load. Its been my intention to remo...
by ZL2WHO
Mon Jan 28, 2019 2:59 pm
Forum: Contests, Field Days, Portable Operation, JOTA, SOTA
Topic: 2019 Summer VHF-UHF Field-Day Contest
Replies: 17
Views: 1942

Re: 2019 Summer VHF-UHF Field-Day Contest

Who forgot the chainsaw... I guess there is a gap between the trees ?
by ZL2WHO
Sat Jan 19, 2019 7:44 am
Forum: 1296, Microwaves and Opto
Topic: Cheap WIFI amp Mods for 2.4 (and up?)
Replies: 17
Views: 3417

Re: Cheap WIFI amp Mods for 2.4 (and up?)

I had a play a few years back with a lower power unit. I found quickly that the o/p device was not suitable for 100% carrier having been designed for a Tx/Rx duty cycle. Recently I purchased a 1.8G cell PA rated to 20 odd watts but at 2.4 could only get around 10w which is not to be sneezed at. All ...
by ZL2WHO
Sun Jan 06, 2019 6:24 pm
Forum: Transceivers, Transmitters & Receivers
Topic: TS2000 2m PA device Type
Replies: 5
Views: 610

Re: TS2000 2m PA device Type

Hi KJ.
Can anyone help to identify which was used in my model from a serial number? Or direct me to where this info might be found


Have you tried looking in the radio ? lol.
Im guessing you are wanting to upgrade to the latest device ?

Mark
by ZL2WHO
Sat Jan 05, 2019 2:40 pm
Forum: Transceivers, Transmitters & Receivers
Topic: FT-857/897 deaf on 2m?
Replies: 6
Views: 694

Re: FT-857/897 deaf on 2m?

Iv had mine on a generator and I hear down to -130 ish from memory. The only real way will to compare it with a few known good radios.. I suspect its more of a noise figure issue than being deaf. Sinad readings would also be a good way to tell, Think I saw a sinad test on utube somewhere. As the 897...
by ZL2WHO
Sat Dec 29, 2018 2:29 pm
Forum: 50 MHz
Topic: What has FT8 done for 6m ?
Replies: 28
Views: 2450

Re: What has FT8 done for 6m ?

In my view FT8 shows how bad things really are. Its a great asset but only a few years ago we were struggling to find a clear SSB freq. Gone is the prop that we were so used to, Off to the beach, think ill make some 6m mobile contacts to VK.. Gone are the 10m contacts into EU.. 49.75 vids are virtu...
by ZL2WHO
Fri Dec 28, 2018 6:29 am
Forum: 50 MHz
Topic: What has FT8 done for 6m ?
Replies: 28
Views: 2450

Re: What has FT8 done for 6m ?

In my view FT8 shows how bad things really are. Its a great asset but only a few years ago we were struggling to find a clear SSB freq. Gone is the prop that we were so used to, Off to the beach, think ill make some 6m mobile contacts to VK.. Gone are the 10m contacts into EU.. 49.75 vids are virtua...
by ZL2WHO
Tue Dec 18, 2018 5:01 pm
Forum: 144 & 432 MHz
Topic: FS1000A 433 MHz SAW ASK transmitters
Replies: 4
Views: 1320

Re: FS1000A 433 MHz SAW ASK transmitters

Hi Adam. Be interesting to see the reply if indeed you get one. I had a xtal in a cct that stopped oscillating at a given temp. I was able to prove this to the supplier, in this instance they were the manufacturer so they sent me replacements. Id be asking for a handful of free boards for you troubl...
by ZL2WHO
Sat Dec 15, 2018 12:11 pm
Forum: General Discussion
Topic: FT8 version 2 is coming
Replies: 38
Views: 3396

Re: FT8 version 2 is coming

My experiences with the changeover. Finding the link I downloaded the software. Checking our internet speed ( we have glass to the modem) i saw 84MB/s but the wsjt was only downloading at a dreadful 11k/bps. After the download i ran the install and noted lots of errors, clicking ignore I saw a messa...
by ZL2WHO
Sun Oct 21, 2018 4:31 pm
Forum: General Discussion
Topic: Problem with mapping tool
Replies: 7
Views: 1121

Re: Problem with mapping tool

Hi. I get the same. Haven't had the time or knowhow to investigate. Perhaps Mr google might know the answer ?
by ZL2WHO
Thu Oct 04, 2018 6:16 pm
Forum: Transceivers, Transmitters & Receivers
Topic: Using FT-857 or 897 with transverters
Replies: 11
Views: 917

Re: Using FT-857 or 897 with transverters

Yep.. radio power out is unstable for the first few milisecs, not that great if your powering LDMOS if you protection is not upto scratch. To get around this i dont use on AM or FM for testing. Needless to say an attenuator is mandatory. This maybe of interest... http://ka4cid.blogspot.com/2008/11/r...
by ZL2WHO
Sun Sep 23, 2018 5:26 am
Forum: 1296, Microwaves and Opto
Topic: SHL 7008 23cm Power block
Replies: 1
Views: 593

SHL 7008 23cm Power block

Hi all. A few years back I purchased this UHF power block https://www.ebay.com/itm/1pc-MOTOLORA-SHL7008-SHL-7008-Module/392113004138?hash=item5b4bc19e6a:g:CooAAMXQLs5RpVxG at around $12nz it was worth the gamble. A spare hour in the workshop saw me mounting it up and throwing some drive at it from t...
by ZL2WHO
Wed Aug 24, 2016 4:16 pm
Forum: Ancillary, Test Equipment, Components & Parts
Topic: Counterfeit BLF188XR
Replies: 7
Views: 2145

Re: Counterfeit BLF188XR

Thanks for those that replied. Can I ask that buyers of the device post here the No.s on the top. For example the only No. I have had as a counterfeit part has been .... Date code, top left. 8623 Batch No. NXP m1327. I'm interested to know if the fake parts are limited to this these Nos. The good de...
by ZL2WHO
Tue Aug 23, 2016 4:40 pm
Forum: Ancillary, Test Equipment, Components & Parts
Topic: Counterfeit BLF188XR
Replies: 7
Views: 2145

Counterfeit BLF188XR

Hi all.

Well it had to happen eventually, some little s**t has relabeled transistors as BLF188xr. :shifty:

See here for my my blurb. https://forums.qrz.com/index.php?thread ... 429/page-2

73
Mark
by ZL2WHO
Wed Aug 17, 2016 2:57 pm
Forum: Propagation & Solar Cycle News
Topic: Solar Cycle 25...how old will u be?
Replies: 39
Views: 8058

Re: Solar Cycle 25...how old will u be?

Your all making me feel like a bit of a whipper snapper. Ill be planning my 60th with pole dancing and strippers... :popcorn: :beer: I left this 6m game too late so have missed all the US prop that you could work on a whip and 10w. ( I think that part is made up ). So yes ill be here giving it a nud...
by ZL2WHO
Mon Aug 08, 2016 11:53 am
Forum: EMC, Interference
Topic: Electric Blanket EM Field - When it's turned off
Replies: 11
Views: 2215

Re: Electric Blanket EM Field - When it's turned off

Hi Brian. My guess is that the switch on the controller is controlling a scr of triac or whatever. If the controller off position and be reconfigured to interrupt the phase then no field should be present when switched off. Even with this field present as there is no current flowing then no emf will...
by ZL2WHO
Fri Jul 29, 2016 7:12 pm
Forum: 1296, Microwaves and Opto
Topic: ZL2WHO/B 23cm Panel Antenna
Replies: 7
Views: 1045

Re: ZL2WHO/B 23cm Panel Antenna

Hi Roger. No improvements for the existing Beacon planed. Mark 3TKI has in the last week notified me that the Beacon was decoded over a 24 hour period. I guess it's all up to conditions. What improvements would you like to see ? I doubt a 3dB improvement would be noticed but a 10dB increase would be...