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Region: UT
City: Provo
Postal Code: 84606
Latitude: 40.218101501465
Longitude: -111.61329650879
Area Code: 801
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The RadioBoard   DA: 21 PA: 21 MOZ Rank: 42

  • Thank you for visiting The RadioBoard
  • This board's reason for being is it serves the homemade radio builder
  • Other boards has this as an extra feature, but here it is the main feature
  • If this is your interest too, come and join us

The RadioBoard Forums   DA: 17 PA: 4 MOZ Rank: 22

  • Political or hot topic discussions on The RadioBoard are discouraged
  • Last post Re: Dave are you there? by Richard
  • The forum for radio related posts, non-homebrew radio questions and …

The RadioBoard   DA: 25 PA: 25 MOZ Rank: 52

  • Thank you for visiting The RadioBoard
  • I am Dave Schmarder, the board owner
  • Between the two of us we keep the board running
  • Not because I was able to get it running, but because of the fine membership that uses this board.

[email protected] Home   DA: 9 PA: 16 MOZ Rank: 28

  • Help: [email protected]; Group Settings
  • All members can post to the group
  • Posts to this group do not require approval from the moderators
  • Posts from new users require approval from the moderators
  • Messages are set to reply to group.

Theradioboard   DA: 16 PA: 22 MOZ Rank: 42

  • Donate to Us Support theradioboard by making a donation
  • Forums Topics Posts Last post; Introduction/Tutorial Forum Introduction and video tutorials.

The RadioBoard (OT   DA: 15 PA: 40 MOZ Rank: 60

TRB (The RadioBoard) is (was ?) a low traffic forum, but full with good stuff and knowledgeable people hanging around, that's why from time to time I lurked there and enjoyed reading discussions about new project and other stuff, the two main "bosses" of the site are/were Dave Schmarder and Jim Kearman; but now the whole forum went "poof" and even if the web …

DNS Checker   DA: 14 PA: 14 MOZ Rank: 34

  • DNS Checker provides a free DNS lookup service to check Domain Name System records against a selected list of DNS servers located in multiple regions worldwide
  • Perform a quick DNS propagation lookup for any hostname, and check DNS data collected from all available DNS Servers to confirm that the DNS records are fully propagated.

The Legendary Thunderbirds: The Largest Birds That Ever   DA: 22 PA: 50 MOZ Rank: 79

  • In October 2020, the Smithsonian Magazine ran a fascinating article on what may have been the largest bird that ever lived
  • In part, the article stated: “Imagine an albatross with a hacksaw for a mouth
  • Set that strange creature about 50 million years in the past and you’ve got the image of a pelagornithid, a group of ancient avians that included some of the largest flying …

Dave's Homemade Crystal And Tube Radios At   DA: 14 PA: 10 MOZ Rank: 32

  • As someone that is interested in the topic of homemade radios, I wish to extend an invite to join other like minded people at a forum called The RadioBoard! I also want to invite you to the other sections of The RadioBoard website including the RadioContest section
  • Here you will see some more very nice examples of well

[email protected] Join   DA: 9 PA: 21 MOZ Rank: 39

  • Thank you for your interest in joining [email protected]
  • To complete your membership in this group you must either Log In or tell us your email address below.
  • If you are already a member of [email protected], Log In to access the group.

Antique Radio Forums • View Topic   DA: 17 PA: 21 MOZ Rank: 48

  • (Make sure there's at least one space between the IP address and the URL), then save the file
  • Then, clicking on your radioboard bookmark or entering "" into the address bar should get you there
  • Once the DNS entry has been fixed, you should go back and delete this line from your hosts file.


ok --finally got a station on this simple fm receiver (i noted in the foto ---there is a antenna sticking yp from that l1 coil !!! so --i connected a long antenna --200 meters thru tree tops

The Radio Information Board   DA: 18 PA: 10 MOZ Rank: 40

  • TAIT Equipment Discussion regarding Tait Equipment
  • Portables: TP9400 TP9461, TP9100 Mobiles: TM9400 & TM9100
  • Base stations/Repeaters: TB9400 TB9100 & Transportable.

SolderSmoke Daily News: Lighthouse Larry's GE Sideband   DA: 24 PA: 50 MOZ Rank: 87

  • Crystal Radios • Re: First time doing a basket weave
  • Need advice - I am going to try something this weekend with 16 or 18 gauge magnet wire
  • I am leaning toward a Rook right now
  • Statistics: Posted by KI5AAI — Fri Oct 15,

Radios That Work For Free.   DA: 15 PA: 6 MOZ Rank: 35

  • this video I had the privilege of interviewing Mr K E Edwards, the author of Two books on Crystal Radios

Visit   DA: 26 PA: 18 MOZ Rank: 59

  • visit the most interesting The Radio Board pages, well-liked by users from Russian Federation, or check the rest of data is a low-traffic web project, safe and generally suitable for all ages
  • We found that English is the preferred language on The Radio Board pages.

Antique Radio Forums • View Topic   DA: 17 PA: 21 MOZ Rank: 54

  • Joined: Jan Thu 01, 1970 1:00 am Posts: 16854 Location: S

SolderSmoke Daily News: SST -- QRP On The Beach   DA: 24 PA: 30 MOZ Rank: 71

  • TheRadioBoard Forums Solid State Radios • Re: Help with Kitchin regen oscillation - Hi I've decided to abandon this one for now
  • I tried rebuilding the circuit on a breadboard and replicate my earlier success and could not get it to osci

LM566C Voltage Controlled Oscillator   DA: 15 PA: 45 MOZ Rank: 78

TL/H/7854 LM566C Voltage Controlled Oscillator February 1995 LM566C Voltage Controlled Oscillator General Description The LM566CN is a general purpose voltage controlled oscil-

Crystal Radio With Sensitive But Low Selectivity For   DA: 14 PA: 10 MOZ Rank: 43

Might I suggest checking out the forums @ They cover all kinds of crystal radio information such as frequency & types of wire, multiple design topics ,types of diodes etc (A Vast knowledge base) also the owner of Peebles originals (seller of components) is a regular member.

Dave's Homemade Radios Visitors Page – Nick's RG Signal   DA: 14 PA: 28 MOZ Rank: 62

  • Any comments will be gratefully received and as usual I can be contacted by e-mail or via The RadioBoard and QRZ forums as G0CWA
  • I cannot guarantee to see your questions if posted elsewhere

Everyone Should Build At Least One Regenerative Radio   DA: 12 PA: 50 MOZ Rank: 83

  • Everyone Should Build At Least One Regenerative Radio Receiver
  • When we build an electronic project in 2016, the chances are that the active components will be integrated circuits containing an Site   DA: 22 PA: 19 MOZ Rank: 63

  •| Owner: Chrsitopher Barnes| Creation date: 2007-09-07T21:38:58Z

DNS Checker   DA: 18 PA: 18 MOZ Rank: 59

  • DNS propagation is the term commonly used to check the current state of DNS results globally and is often asked about when changes made to DNS zones do not appear to be working as expected
  • This process can take from only a few minutes, but often takes up to 48-72 hours and sometimes longer.

Get Lost In VHF Circuit QRZ Forums   DA: 14 PA: 10 MOZ Rank: 48

Hallo to all ham amateurs, i am teacher in a lyceum and my class is intend for a project with a VHF receiver covering the marine bands such as 156.000 MHz - 162.000 MHz.

Antique Radio Information And Links, Antique Airwaves   DA: 19 PA: 19 MOZ Rank: 63

  • TheRadioBoard Forum for the homemade radio builder
  • Tubes Asylum It's all about the vacuum tube Tube Radio Forum UK Vintage Radio Repair and Restoration Forum Antique Radio Newsgroups: Newsgroups are not web page based
  • For more info on how to access newsgroups: What is Usenet?

Receiving VLF With A PC Sound Card, Miniwhip Antenna And SAQrx   DA: 15 PA: 50 MOZ Rank: 91

  • Over on YouTube user Mile Kokotov has uploaded a video showing how he is able to receive Very Low Frequency (VLF) signals between 300 Hz to 30 kHz using just his PC, a Miniwhip antenna connected to his sound card input port and a program called SAQrx Panoramic VLF Receiver
  • This allows reception of signals between 0-48 kHz with a sound card that can …

BH1RBG RF Lab   DA: 16 PA: 50 MOZ Rank: 93

  • Fist of all, use capacitor as throttle regen control, this is the key factor for smooth regen control
  • use tickle coil as regen feed back, at high frequency this increase the feed back then improve the smooth
  • use pre RF stage to reduce aeronautical effects, prevent antenna absorb the tank energy, isolation the detector, provide a

AM Receiver Circuit   DA: 21 PA: 20 MOZ Rank: 69

  • Here is a low cost AM receiver circuit that can be tuned from around 550 to 1100 KHz
  • Three transistors are used in this project
  • The transistors Q1 and Q2 are wired as a compound transistor pair in which Q1 is an emitter follower and Q2 is a common emitter amplifier
  • The emitter follower prevents the loading

FM Radio Receiver Circuit   DA: 25 PA: 19 MOZ Rank: 73

  • This simple fm radio receiver circuit consists of a regenerative rf stage, TR1, followed by a two of three-stage audio amplifier, TR2 to TR4
  • In some areas 3 stages of audio amplification may not be necessary, in which case TR3 and its associated components can be omitted and the free end of capacitor C5 connected to the

Does The Sproutie Regen “Work” On SSB And CW   DA: 19 PA: 50 MOZ Rank: 99

  • It works fine on SSB but when the input signal is too strong, the oscillator pulls, resulting in FM’ing of the signal
  • In order to overcome this, the best way to operate The Sproutie when listening to SSB is to run the AF gain at, or near, maximum volume, and use the RF gain to set the desired volume
  • This will ensure that on strong signals

Radio Quaderno   DA: 27 PA: 27 MOZ Rank: 85

  • The Detrola Model 438 was made by the Detrola Company, and employs five standard WWII type octal tubes, including a VT150 oscillator/mixer and a couple of 6L6’s for audio output
  • The BC-1206 was built by Setchell Carlson and uses five 14 volt loctal tubes like the 14A7 and 14J7 and a 28D7 output tube.

Building A WBR Regen Receiver For The 31M Broadcast Band   DA: 19 PA: 50 MOZ Rank: 18

  • Building A WBR Regen Receiver For The 31M Broadcast Band (or the 30M Ham Band) Note – some of the narrative in this blog-post assumes that you have access to, and have read, N1BYT’s original article on the WBR Receiver in the August 2001 edition of QST
  • EDIT – as of July 2016, I just modded this receiver to cover the 30M ham band only

Create Radio Receiver Circuits With The LM386 Audio   DA: 11 PA: 50 MOZ Rank: 94

  • The circuit for this receiver is shown in Figure 2
  • Figure 2 The LM386 can be used as a tuned radio frequency receiver
  • The datasheets for the LM386 indicate that its gain is greater than unity (10 dB) at frequencies exceeding 1 MHz ( Figure 3 )
  • For this reason the LM386 is able to oscillate in the medium wave AM band (540 to 1600 kHz), making

Dave Schmarder ~ On The Verge Of Mental Stability   DA: 17 PA: 6 MOZ Rank: 57

  • Dave Schmarder Traveling at over 65? Hi Friends and foes
  • Dave Schmarder is still here and I have a new web page for you
  • The big news is that I passed the big sixty-five mark a …

How To: Make A Simple Crystal Radio : 5 Steps   DA: 21 PA: 37 MOZ Rank: 93

  • How To: Make a Simple Crystal Radio: I know there is many on this topc but this is slightly different
  • Instead of using magnet wire, gelana, iron pyrite, germanium diodes, I have used a rusty knife blade (A craft knife with the snap of blades) and a pencil lead as a detector, a crysta…

Kleer-Tone Experiment   DA: 36 PA: 31 MOZ Rank: 14

  • Post by Bill M You guys might find this interesting
  • This Kleer-Tone thing was an add-on device back in the 1920s radio gimmicks era for antenna tuning.

Reverse-engineering The TL431: The Most Common Chip You've   DA: 14 PA: 50 MOZ Rank: 13

  • The TL431 is a "programmable precision reference" and is commonly used in switching power supplies, where it provides feedback indicating if the output voltage is too high or too low
  • By using a special circuit called a bandgap, the TL431 provides a stable voltage reference across a wide temperature range.

Qrp-gaijin: Varactor-tuned Shortwave Superhet Design, Part 1   DA: 23 PA: 47 MOZ Rank: 12

  • However, a recent posting on TheRadioBoard (Reference 1) showcased one individual's homebrew shortwave superheterodyne receiver
  • That posting includes a link to a YouTube video of the set in operation
  • The set is obviously a good performer, and it is designed with some similar goals as my envisioned design
  • That inspired me to again resume my

Crystal Radio Impedance Matching Transformer KPB-02 200KΩ   DA: 12 PA: 50 MOZ Rank: 11

  • Here you are bidding on an especial design Audio Matching Transformer for Crystal Radio, they have 17 steps of input and output impedance from 200KΩ to 4Ω, due to their plentiful inductance of coil, they can be used as 400KΩ impedance transformer and still have good performance
  • You also can order the KPB-02 Crystal Radio Impedance Matching

QRP HomeBuilder   DA: 24 PA: 37 MOZ Rank: 10

  • At normal room volume, you might get this on some stronger signal peaks
  • The 4 controls on a regenerative receiver keep your hands busy
  • Some combination of those 4 tweaks will give you the best sounding audio and hopefully keep the signal level where minimal clipping of peaks occurs.

Why Does An LED Light Up When I Touch It   DA: 29 PA: 50 MOZ Rank: 9

  • This happens because the LED flashes on the forward cycle, then experiences breakdown on the reverse cycle, so can conduct some AC via that between-windings unwanted capacitor
  • (An ideal LED would just flash once when first connected, as it charged up the series capacitance, which would then block any further DC signal.

NiZn Ferrite Rod R40C1- 200x10mm For High Q Amateur   DA: 12 PA: 17 MOZ Rank: 71

  • The R40C1Ferrite rod made by special formula
  • We don’t know why this type of Ferrite rod has very high Q when wind the coils for LW, MW and SW
  • I introduce the R40C1 here because the Crystal Radio enthusiast always wants to make coils that have high Q and want them as high as possible.

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