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Re: 60 Meter homebrew rig IF frequencies
How about an IF of 455 Khz? Readily available and out of any amateur band.
[email protected]> wrote:
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Ryan Flowers
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#9477
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Re: RF Power Transistors
Thanks Steve,? exactly what I need.? One question,? is the unlabeled capacitor to the left of T2 a .1uF?
Doug
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Doug Hendricks
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#9476
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60 Meter homebrew rig IF frequencies
I am thinking building a version of my single band single band 40 Meter SSB transceiver? to work on 60 meters, but have to carefully choose an IF frequency.
The current IF frequency for te 40
By
hwstar
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#9475
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Re: RF Power Transistors
Here is the schematic of the PA transistor test fixture I'm using, and a picture of it with a reference 2SC5739 installed.
It's easy and fast to simply bend the base and collector leads out at right
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Steve Ratzlaff
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#9474
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Re: RF Power Transistors
Thank you Steve - I ordered a few. I think that if sellers are slow to ship, they should set expectations, by saying something like, "I only ship at weekends. If you order on Monday, your order will
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Dave AA7EE
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#9473
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Re: RF Power Transistors
Steve can you share a schematic of your test setup.? Maybe a couple of pics.
Doug,? KI6DS
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Doug Hendricks
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#9472
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RF Power Transistors
I've recently been testing a 14Mc power amp circuit, comparing several output transistors for 5 watts (45 Vpp) into a measured 50 ohm dummy load. I put a scope probe on the output and adjust for 45
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Steve Ratzlaff
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#9471
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Re: Charles Kitchen, N1TEV SK
Very sorry to hear that Charles has passed. He contributed much to our
hobby.
Prayers for his family.
Jim WB4ILP
[email protected]> wrote:
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Jim WB4ILP
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#9470
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Re: Charles Kitchen, N1TEV SK
Sad news.
My first ever successful regen build was a Kitchin design.
73 de VK2HHS Henrik
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Henrik Stenstrom
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#9469
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Charles Kitchen, N1TEV SK
Gang,
I first discovered Charles Kitchen when I started looking for regenerative receiver circuits many years ago.
A few days ago I watched this very informative youtube video in which Mike Murphy
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Alan N8WQ
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#9468
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Fun With BJT (Bipolar Junction Transistors) For Biz Admin Majors
Folks,
Chuck mentioned scoring a bag of 2N3904s and I similarly discovered a mess o' 2N4401s. Suspecting that there may be caches of the popular NPNs (and their matching PNPs) around, here's a sample
By
k6whp
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#9467
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Schematics for 10 watt 40 Meter Transceiver
Here are the schematics for all of the boards for the 10 Watt SSB transceiver discussed
By
hwstar
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#9466
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Re: New single band superheterodyne transceiver
The IF is 12.288 MHz which works well for 40 meters because it far away from the LO and band frequencies. For LSB the LO is in the 5 MHz range.
The crystals I used for the filter are CTS MP122's:
By
hwstar
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#9465
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Re: New single band superheterodyne transceiver
I rolled my own for both the mixer and the product detector. Its a diode ring DBM.? It consists of 2 trifilar wound FT37-43's with #30 AWG magnet wire, and 4 BAT54 diodes. The first mixer has a 100
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hwstar
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#9464
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Edited
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Re: New single band superheterodyne transceiver
What is your I.F. frequency? I'm curious because I have a similar superhet
receiver using the HYCAS board and an 8 MHz I.F. I'm currently using a
Si5351a for both L.O. and BFO. It sounds pretty good
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Nick Kennedy
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#9463
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Re: SolderSmoke DC Receiver Challenge
You can download the STL file from the Soldersmoke discord server : https://discord.com/channels/1326289906603135116/1338916298549104734/1338932560822276176
Or when you up to it, you could build a
By
Lex PH2LB
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#9462
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Re: f_T fixture and cheap transistors [long]
Chuck,
Thanks for lighting the fire under my rear. I have my Raspberry Pi Pico based jig working now, after a couple days of struggling with programming. Hardware design and soldering was the easy
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vbifyz
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#9461
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Re: New single band superheterodyne transceiver
What's your receive mixer?
Tks
Jerry
KI4IO
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Gerald Wolczanski
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#9460
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Re: Digi-key
I looked forward to Doug Demaw¡¯s articles. I built a two band version of the progressive communications receiver from about 1981. I remember how impressed I was that the direct conversion part
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Tech Guy
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#9459
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Re: Digi-key
Alas, I yearn for the [late] 70s when I semi-accidentally subscribed to Wayne Green's 73 Magazine. From 1977 through the early 80s, each magazine was chock full of projects, tech articles, and general
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k6whp
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#9458
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