Tube Ham Radio
Tube Ham Radio
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Trisonic 1/2 Ounce 60/40 Tube Solder $0.01 ? Trisonic 1/2 Ounce 60/40 Tube Solder ? 7 Inch Dispensor Tube ? 60 % Tin ? 40 % Lead Resin ? Blister Carded... |
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Covert Earbud Mic Motorola CP200 CLS1110 PR400 CP100 $22.96 Compatible Ham Radio Model: Motorola VHF / UHF Spirit, Spirit Pro, Spirit Pro+ Motorola Spirt Series: SV10, SV11, SV11D, SV21, SV12, SV22, SV22C, SU210, SU22, SU22C, SU220 XTN Series: XTN446, XTN500, XTN600 XTN XV Series: XV1100 XV2100 XV2600 XTN XU Series: XU1100 XU2100 XU2600 CLS Series: CLS1110, CLS1410, CLS1413, CLS1450, CLS1450C Spirit M Series: MV11, MV11CV, MV12, MV12CV, MV21C, MV21CV,... |
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Covert Acoustic Tube Earpiece for Kenwood Radio 2-Pin $22.00 Twin right angle: Ear 3.5mm stereo (top pin). Mic 2.5mm stereo (bottom pin).? ² Spaced Between Two Pin: 11mm? ² Compatible Ham Radio Model: ? Type |
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Build Your Own Crystal Radio Lab Kit $13.95 Build your own working crystal radio. Look for and pick up radio stations. Earphone and antenna included. No tools or batteries required. Remember the days of the first radio.... |
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Bike Handlebar Holder Mount System for the Pioneer Inno - Gomadic Brand $24.95 Our New Gomadic Handlebar Holder allows you clear visibility and finger tip access to your device in an attractive streamlined package. Have confidence of a secure mount with the introduction of a three channel clamp system to accommodate a wider range of handlebar diameters with a more accurate fit. The rubber clamp system includes an innovative ribbing to prevent the mount from rotating on the h... |
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Bike Handlebar Holder Mount System for the Insignia NS-HD02 HD Radio - Gomadic Brand $24.95 Our New Gomadic Handlebar Holder allows you clear visibility and finger tip access to your device in an attractive streamlined package. Have confidence of a secure mount with the introduction of a three channel clamp system to accommodate a wider range of handlebar diameters with a more accurate fit. The rubber clamp system includes an innovative ribbing to prevent the mount from rotating on the h... |
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Bike Handlebar Holder Mount System for the Sirius One SV1 - Gomadic Brand $24.95 Our New Gomadic Handlebar Holder allows you clear visibility and finger tip access to your device in an attractive streamlined package. Have confidence of a secure mount with the introduction of a three channel clamp system to accommodate a wider range of handlebar diameters with a more accurate fit. The rubber clamp system includes an innovative ribbing to prevent the mount from rotating on the h... |
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Julie's Gift: Memories of London $12.28 Kevin and Julie travel to London. Kevin loathes sightseeing. Julie is the quintessential tourist. Kevin ends up enjoying the trip but doesn't tell Julie. He secretly writes a book about his fond memories to surprise her and express his love.... |
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Radio Receiver Projects You Can Build $24.95 This book offers a fast, inexpensive way to tune in to radio broadcasts from near and far. It contains a collection of radio receiver projects, showing radio buffs how to build 33 different radio receivers, from simple crystal sets, to AM, regeneration, shortwave and advanced IC receivers. Also included are projects for building a solar-powered radio, a high-gain amplifier, converters, preselector... |
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Radio Amateur's Handbook, the - 1962 ...written with the needs ofthe practical amateur constantly in mind, it has earned univeral acceptance not only by amateurs but by all segements of the technical world.... |
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Galaxy DX2517 10 Meter Base Ham Radio $479.00 Galaxy DX2517 10 Meter Base Ham Radio... |
Is it feasible to construct a vacuum tube AM receiver capable of tuning into the VHF or even UHF bands?
If so, how? If not, why not? This is for all the hams and amateur radio techies out there.
Wow, great question...
It was generally not done, only FM was/is used in the VHF and UHF bands. You typically only see AM in the SW bands and up to 30Mhz (is this still SW?). I think VHF starts around 50Mhz and is where TV begins (less channel 1).
So your question is can a reciever decode an AM signal on those higher frequencies... simple answer is YES but it's not practical due to the fact that higher frequencies tend to become "line of sight". ie, they do not curve with the earth or bend around structures. So I would think that normal everyday interference would alter the Amplitude of the Carrier you are receiving, increasingly so on the higher frequencies.
If you are considering a mobile type transmiter/reciever then just forget it, as you drive the carrier amplitude will peek and plunge as you pass buildings if it were tuned to VHF. Hence the need to go to Frequency Modulation (FM) on those higher bands.
This is just my best guess... I would love to hear some HAMs opinion on this.