i recently bought the BH5HDE QRP portable small loop antenna.

And yes it works !,   but do not expect wonders from this loop.

With this product u can easily and quickly set up a short-wave transceiver antenna, allowing you to enjoy the joy of multi-band reception and communication indoors, windows, balconies and outdoors.

But it’s mass-produced and mine had some awful soldering in there.  one of the leads were not even soldered.

Anyway, after some tinkering it was working again, but i thought to make some pics for the ones that want to see what is inside this little box of wonders..

Well it has some hardware lots of wires 2 variable capacitors and a toggle switch and a toroid u can use as a modern mobile heater.

they’re listed as 20 or even 25 watts but please do not use it u will get sorry on the end.  Just stick to 5 or 10watts max..  and u will have a nice qrp pota system

sure there always be that do use it with 25 or even more.. but its up to them if the hardware will be fried on the long term..

Frequency Range:
144—148MHz
430-440MHz
7—30MHz
aeronautical band
FM radio also provides excellent reception

Tuning box:

Band selection switch, pull up 7MHz, pull down 14-30MHz

it’s really hard to get it to tune on 10 meters..

UITERAARD IS DIT BEKEND VOOR DE MEESTE ONDER ONS..

MAAR TOCH KAN HET WEL EENS HANDIG ZIJN OM EEA NA TE ZIEN

Q-code

DUAL-BAND YAGI DK7ZB 144/430 MHz 6+10 el. 200 cm

zeer slechte SWR maar dat kon ook niet anders.. RVS en Aluminium gaan niet zomaar samen

de boutjes en moertjes zijn allemaal verwijderd..

alles in rvs verzinkt vervangen..

de driver  was een aantal mm te kort ook deze vervangen voor een nieuwe buis.

binnenkort weer een update

Werkbereik: 144-146 MHz / 430-440 MHz
Versterking: 11,5 dBi / 12,4 dBi
Vermogen: 600/300 Watt
SWR in 1: 1 band
Socket: N teflon zilver verguld
Pasvorm: 50 Ohm
Lengte: 200 cm
Breedte: 104 cm
Gewicht: ongeveer 1,8 kg

inmiddels heb ik de data ontvangen van Dennis PA2DT

dank je wel Dennis

How to manually program a simplex channel

• Step 1. Press [VFO/MR] and enter Frequency Mode.
• Step 2. Press [A/B] and choose the A Side (upper display).
  The A side must be used to program channels into the radio. Programming data entered on the B Side (lower display) will not be saved.
• Step 3. Press [BAND] for the frequency band.
  Toggle [BAND] to choose 136 MHz (VHF) or 470 MHz (UHF).
  If the incorrect band is chosen for the frequency entered in Step 5, the radio will cancel the operation.
• Step 4. Disable TDR (Dual Watch/Dual Standby).
  Press [MENU] 7 [MENU] [press up/down arrow keys] OFF [MENU] [EXIT]
  It is highly advised to turn TDR off when programming directly from the radio.
• Step 5. Enter the frequency.
  Use the keypad to enter the frequency into the radio.
• Step 6. optional – Enter the transmit CTCSS/DCS code.
  • CTCSS – [MENU] 13 [MENU] [enter/choose code XXXX] [MENU] [EXIT]
  • DCS – [MENU] 12 [MENU] [choose code XXXXX] [MENU] [EXIT]
• Step 7. Assign the frequency to a channel.
  [MENU] 27 [MENU] [enter channel number XXX] [MENU] [EXIT]

How to manually program a repeater channel

• Step 1. Press [VFO/MR] and enter Frequency Mode.
• Step 2. Press [A/B] and choose the A Side (upper display).
  Like the simplex channels, the A side must be used to program the repeater channels into the radio. Programming data entered on the B Side (lower display) will not be saved.
• Step 3. Press [BAND] for the frequency band
  Toggle [BAND] to choose 136 MHz (VHF) or 470 MHz (UHF).
  If the incorrect band is chosen for the frequency entered in Step 6, the radio will cancel the operation.
• Step 4. optional – Clear any CTCSS/DCS codes previously assigned to the channel.
  If no previous codes exist or when setting up the channel for the first time and no codes are needed, set the menu items listed below to OFF.
  • RX DCS – [MENU] 10 [MENU] [enter 0 (OFF)] [MENU] [EXIT]
  • RX CTCSS – [MENU] 11 [MENU] [enter 0 (OFF)] [MENU] [EXIT]
  • TX DCS – [MENU] 12 [MENU] [enter 0 (OFF)] [MENU] [EXIT]
  • TX CTCSS – [MENU] 13 [MENU] [enter 0 (OFF)] [MENU] [EXIT]
• Step 5. Disable TDR (DualWatch/Dual Standby).
  Press [MENU] 7 [MENU] [press up/down arrow keys] OFF [MENU] [EXIT]
  It is highly advised to turn TDR off when programming directly from the radio.
• Step 6. optional – Delete any existing data on the channel to program.
  Skip this step when setting up the channel for the first time. Press [MENU] 28 [press up/down arrow keys to choose channel number] [MENU] [EXIT]
  It is highly advised to turn TDR off when programming directly from the radio.
• Step 7. Enter the frequency.
  Use the keypad to enter the frequency into the radio.
• Step 8. Input the repeater frequency offset.
  Press [MENU] 26 [MENU] [enter the offset for 2 meter or 70 cm repeater] [MENU] [EXIT]
• Step 9. Enter the Transmit Frequency Shift.
  Press [MENU] 25 [MENU] [enter 1 for positive shift or 2 for negative shift] [MENU][EXIT]
• Step 10. optional – Enter the transmit CTCSS/DCS code.
  • CTCSS – [MENU] 13 [MENU] [enter/choose code XXXX] [MENU] [EXIT]
  • DCS – [MENU] 12 [MENU] [choose code XXXXX] [MENU] [EXIT]
• Step 11. Enter the repeater output frequency.
  Use the keypad to enter the frequency into the radio.
• Step 12. Assign the receive frequency to the same channel in Step 6.
  [MENU] 27 [MENU] [enter channel number XXX] [MENU] [EXIT]
• Step 13. Press the [*Scan] button to activate Reverse Mode and display the transmit frequency.
• Step 14. Assign the transmit frequency to the channel.
  Press [MENU] 27 [MENU] [enter the same memory channel in step 27] [MENU] [EXIT]
• Step 15. Press the [*Scan] button to exit .

my Shack in a box  (attempt hi)

I’ve been working on my “Shack in a Box” / “Gobox” for a couple weeks now.. The idea behind this is to have my HF radio in a single portable case that can be used both from my desk as well as the field or my car the antenna being used is the Dxslidewinder pro. Love that antenna. the Box can work on 230v with a plug on the back or my 12 v power box with mini starter battery.

This setup allows me to run voice and digital modes on HF using a Yaesu FT-991B and voice the radio is hooked up view Serial/USB cables to a Windows rugged mini i3 pc I use fldigi, sdrplay psk31 and even linux bootable is possible  now..

hardware that i used so far for this build.

Gator 19 inch flightcase

hdmi/vga monitor portable mini monitor 10 inch.

yeasu ft991B radio

sdrplay sdruno and elad  tuning knob.

2 fans running 2 speeds.  push pull config..

usb powered mini audio amplifier with speaker.

I3 mini pc running potato windows 10 wifi and utp on the back.

keyboard is a bluetooth mouse all in one.

12v 30 amp powersupply  used from a old 3d printer.

had this in the bin.. a wirewound resistor.. its working great to slow them two sunon fans down with a switch..

sunon fans they are in push pull config and they keep the temps low… but there loud LOUD at full speed..

left u see the sdrplay on the right the yeasu. and the resistor is getting extra cooling this way also and i have used 9 ferrites in this setting

The windows mini pc is doing a great job here.. remote control and decoding at the same time is no issue .ft8 and other software is working great.. no heat issues since i have them fans switched to sunons.

Rosenberger coax i had rg58 cables before but the amount of noise was to much, this coax is way better for qrm shielding.

on the left side u see the 3d printed speaker unit.. it’s got a usb powered amplifier inside the speaker housing for the

extra punch when listening to pc audio..

3d printed fanguards are needed them sunons are fingerlicking good..

the wifi antenna is mounted on the back now. it was inside but it was having problems with the wifi

so i can choose to work true lan or wifi or even bluetooth now..

hi there

if u had a contact with me on the radio.   and its not listed on Lotw or Eqsl

the error may be on my side.    it’s not that i don’t want a eqsl. (in fact i like them)

but more my lack of skills in handling the logging software or wsjt-x

i still have most logs but need some help with the software to get them online.

some records are logged others are stuck somewhere.. can’t get them to upload.

just send me a message on pd4dd@ziggo.nl of leave a message in my guestbook..

just ask and i will help u out as far as i can.

sorry for the rookie mistakes..

73,s PD4DD

AT-412/TRC AT-412 100-225MHZ DIPOLE ANTENNA MILITARY

Een oud mechanisch meesterwerkje

ORIGINAL AT-412 ANTENNA FOR AN/TRC 24 SYSTEM 1945S-1960S

Zover ik begrepen zijn deze gebruikt in de Vietnam oorlog door de Amerikanen.

De 4 armen van de dipool zijn in 4 telescoopsecties en kunnen tussen 29 en 49 cm worden verlengd en ingekort. Ze worden op de gewenste maat vergrendeld met schroefmoeren,
De 4 armen (maar ook de short op de lijnen) zijn gemarkeerd in 3 posities,
de eerste: B1 – B71
de tweede: B72 – B170
de derde: B171 – B250,

ik denk zelf dat dit de MHz afmetingen  zijn.

De schuifmechanisme waren niet alleen om de dipoollengte in te stellen, maar ook de afstand van de dipool tot het reflectoroppervlak. deze antennes zijn ergens gebruikt in de US Strike Command-groep 1945 tot 1960. Ze werden gebruikt voor het  AN / TRC-24-systeem . en zijn  in de VS gemaakt.

Help wanted!

SIGNAL CORPS US ARMY

if u have any info regarding to this antenna or photos of the antennas in use

or where it was used and for what.   any info is much apriciated please contact me true the guestbook option or mail… thank u.. 

thank u very much

My first qso on 40meters  was with Christian OZ1FDE from Denmark on

3-4-2022    7131 lsb  20:35

I heard him calling CQ,and i thought he will never hear me on that small antenna in my backyard .. but what? he replied!

I was sending about 20 watts on my yaesu ft991 on a OPEK HVT-400B HF/VHF Multi-Band Mobile Antenna  it’s a  small mobile antenna in the backyard on a tripod..

he was using about 400 watts, his signal was booming.  but my signal was erm weak. lol, it was a difficult qso, but  i had it..!!!

As far as i can see.  Christian OZ1FDE  does not have eqsl or lotw.. . and google was not giving me more information how to contact Christian OZ1FDE to send him a card myself.

so if u ever hear him or speak to him .. pse let him know this and i will pay to get my first card..

or if u are ever reading this Christian OZ1FDE plse confirm the qso.. 

Distance from Denmark to Netherlands is  aprox 535 kilometers. This air travel distance is equal to 332 miles.

Although he’s was about 332 miles away, I hope to make a more significant contact as the band opens up laterin the cycle  It’s such an exciting feeling!

Wat ook erg gaaf is om te doen is ft8 en of wspr mode.

digitale modes met laag vermogen en dan zo ver mogelijk komen met je signaal..

ik gebruik nu wsjt-x op een  kleine antenne die staat in de achtertuin..

werkt zeker niet super, maar het werkt wel.. beter een antenne dan GEEN antenne .

de radio die ik gebruik voor digitale modes..

FT8 zendt en ontvangt alleen het hoogst noodzakelijke om een ​​radioamateurcontact (QSO) te maken:

uitwisseling van roepnamen, leesbaarheidsrapport, signaalsterkterapport en “met vriendelijke groet” (“73”).

Omdat alleen deze informatie kan worden verzonden, is FT8 geen “conversatie”-modus.

FT8 verzendt dit minimum aan informatie op een semi-automatische manier in zijn eigen tijdsbestek.

Daarom is FT8 geen “keyboard-to-keyboard”-modus (realtime chat).

de tijdelijke antenne tot ik besloten heb wat ik nu exact ga plaatsen..

Eerste kaartje met digitale verbinding vanuit italië.

Wat doe je toch?, Met die  antennes op het dak, of in de tuin. maak je  muziek  radio uitzendingen  ofzo?

Nee hoor ik ben geen radio piraat 🙂  , maar die antennes , dat is  meer voor het spreken van radio stations  in de regio/EU of zelfs Wereldwijd.

Daar ik graag experimenteer met diverse antennes zowel loop (ronde) antennes ,of verticale sprieten ben ik voornamelijk bezig in de achtertuin. dan weer met een draad, dan weer met een andere antenne.

sorry buren , de een heeft schotels de ander waslijnen en ik antennes 🙂 .

Daar ik mijn novice licentie heb gehaald, mag ik op een aantal banden (Frequenties) uitzenden. oa om te experimenteren..

hieronder zie je staan waar ik mag uitzenden en met welk vermogen..

en als een verbinding tot stand is gekomen dan stuur je elkaar een kaartje (Qsl kaart)  als bevestiging..

Dit zijn enorme afstanden onderling, en erg leuk om te horen,  maar als radio amateur kan je  ook signalen ontvangen die wat dichter bij huis worden uitgezonden.
Daarvoor luister je met een ontvanger in de 2-meter band (144-146 MHz), of in de 70 centimeter band (430-440 MHz).

Als je geen eigen ontvanger hebt, zijn de SDR-radio’s op internet een leuk alternatief, bijv. die van Twente

of de ontvanger die ik zelf openbaar heb staan, luister live mee..

of klik gewoon hier voor volledig beeld