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No unread posts Attachment(s) perturb and observe home brew circuit

rchiapparelli

4

188

Jul Tue 05, 2022 3:12 pm

richfair View the latest post

No unread posts Attachment(s) Ordering PCBs: Part 15 PLL Synthesized Transmitter Board

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Macrohenry

134

6453

Jul Tue 05, 2022 6:11 am

Jschuster View the latest post

No unread posts Attachment(s) Macrohenry Transmitter Construction

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Macrohenry

51

1369

Jul Mon 04, 2022 8:13 pm

Macrohenry View the latest post

No unread posts Attachment(s) Macrohenry Transmitter Components

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processhead

62

2643

Jul Mon 04, 2022 4:48 am

Macrohenry View the latest post

No unread posts Attachment(s) Looking for two beta testers for AM Transmitter

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Macrohenry

99

10264

Jul Sat 02, 2022 4:00 am

Macrohenry View the latest post

No unread posts Attachment(s) Telephone Interface Suggestions Sought

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telegrapher

26

1447

Jul Fri 01, 2022 5:41 am

Usually Lurking View the latest post

No unread posts Attachment(s) JFET Testing and Matching

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Frank512

28

1243

Jun Thu 30, 2022 8:38 pm

OldWireBender View the latest post

No unread posts Attachment(s) Crystal radio phasing

Mike Toon

6

202

Jun Wed 29, 2022 10:05 pm

KB4QAA View the latest post

No unread posts Attachment(s) Why does my crystal radio design work?

6tom

18

1205

Jun Wed 29, 2022 4:25 pm

battradio@ View the latest post

No unread posts Attachment(s) Winding Antenna Coils

crm114

5

540

Jun Mon 27, 2022 7:14 pm

err ducks View the latest post

No unread posts Attachment(s) Anyone recognize this 3-tube homebrew?

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1N770

39

2302

Jun Mon 27, 2022 7:12 am

pehamel View the latest post

No unread posts Attachment(s) 455KHz IF oscillator with only three parts

Dare4444

7

664

Jun Thu 23, 2022 5:22 pm

maxequat View the latest post

No unread posts Attachment(s) Zenith console mod question

Tube Radio

3

1901

Jun Mon 20, 2022 6:57 pm

Tube Radio View the latest post

No unread posts Attachment(s) Magnavox AMP-142AB restore and mods

Tube Radio

8

1661

Jun Mon 20, 2022 3:57 am

Tube Radio View the latest post

No unread posts Antique Car Stereo Bluetooth Audio Retrofit with ESP32

jcrubin

3

417

Jun Sat 18, 2022 12:42 am

jcrubin View the latest post

No unread posts A.M. BROADCASTER: MORE PROBLEMS

catsimon

6

453

Jun Fri 17, 2022 2:54 pm

Tim Tress View the latest post

No unread posts Mic pre-amp ideas?

GuitarDick

2

216

Jun Fri 17, 2022 2:03 am

wazz View the latest post

No unread posts Some of my work on one-tube transmitters

K6RRE

5

400

Jun Thu 16, 2022 2:55 pm

forumuser View the latest post

No unread posts Attachment(s) Hat Radio replica

jtn050

12

532

Jun Tue 14, 2022 11:59 pm

Mr. Detrola View the latest post

No unread posts Attachment(s) Audio half of regen rcvr - advice?

allthumbs

15

905

Jun Tue 14, 2022 6:30 pm

allthumbs View the latest post

No unread posts What Is It With 2 4 8 16 Pill RF Amps??

Yorkman

7

540

Jun Tue 14, 2022 3:56 pm

K4PIH View the latest post

No unread posts Hey Thumbs

jimbob

1

231

Jun Tue 14, 2022 1:20 am

allthumbs View the latest post

No unread posts Attachment(s) Homebrew tube lighting counter

sv3ora

9

412

Jun Mon 13, 2022 11:00 pm

Macrohenry View the latest post

No unread posts Semi-universal replacement

Kim N.

8

478

Jun Sun 12, 2022 10:37 pm

mblack View the latest post

No unread posts Attachment(s) Does Anyone Have Information About theradioboard.com?

LM386

18

2253

Jun Sun 12, 2022 8:41 am

aurel View the latest post

No unread posts Attachment(s) New transmitter

Tatem180

3

459

Jun Fri 10, 2022 9:22 pm

Colin Ames View the latest post

No unread posts Attachment(s) Audio Output Transformer choices

Scota4570

2

328

Jun Thu 09, 2022 5:43 pm

battradio@ View the latest post

No unread posts Attachment(s) Dave's 1D8GT

jimbob

9

633

Jun Wed 08, 2022 9:18 pm

jimbob View the latest post

No unread posts Attachment(s) Can you over filter a power supply?

Mike Toon

19

1124

Jun Wed 08, 2022 4:32 am

Pbpix View the latest post

No unread posts Attachment(s) Long wire ( random wire) and ground proximity

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poulsbobill

78

18252

Jun Sun 05, 2022 11:38 pm

Marcc View the latest post

No unread posts Attachment(s) Guitar amp schematic

Scota4570

13

1121

Jun Fri 03, 2022 8:23 pm

NW2K View the latest post

No unread posts Low voltage tube crystal oscillator ALC

neazoi

6

345

Jun Fri 03, 2022 2:32 am

Jim Mueller View the latest post

No unread posts Attachment(s) Interesting noise blanking circuit

Dare4444

0

191

Jun Thu 02, 2022 12:46 am

Dare4444 View the latest post

No unread posts Attachment(s) Center tap on secondary RF coils, what purpose are they?

crabeapple

12

777

May Tue 31, 2022 7:12 pm

infomet View the latest post

No unread posts UNUNs, lightning arrestors but for MW

sgath92

6

395

May Tue 31, 2022 4:23 pm

madlabs View the latest post

No unread posts New FM PLL idea

Dare4444

0

225

May Mon 30, 2022 11:29 am

Dare4444 View the latest post

No unread posts Attachment(s) Need help identifying

robroot61

17

1075

May Sun 29, 2022 4:39 pm

robroot61 View the latest post

No unread posts Attachment(s) Reflex Receiver with MOSFETs

Dare4444

1

370

May Wed 25, 2022 7:05 pm

OldWireBender View the latest post

No unread posts D shaped variable capacitor shafts

jimbob

3

346

May Wed 25, 2022 4:29 pm

Mike Toon View the latest post

No unread posts Can anyone possibly help me to identify this homebrew rig?

Big Nick

12

4136

May Wed 25, 2022 6:10 am

john8750 View the latest post

No unread posts Attachment(s) control amp for a 300B

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john8750

103

7194

May Wed 25, 2022 5:58 am

john8750 View the latest post

No unread posts Frequency counter

jimbob

7

531

May Mon 23, 2022 4:31 pm

mblack View the latest post

No unread posts Attachment(s) 15 watt solid state amp kit question

Tube Radio

14

734

May Wed 18, 2022 9:01 pm

Tube Radio View the latest post

No unread posts Extracting 5V DC from a Bias-T to power a LNA

avicci

1

213

May Wed 18, 2022 12:49 pm

richfair View the latest post

No unread posts Another PLL FM Transmitter (3 Transistor RF Stage + PLL)

Dare4444

0

186

May Sun 15, 2022 3:50 pm

Dare4444 View the latest post

No unread posts Attachment(s) simple space charge rf preamplifier does not work

sv3ora

17

640

May Fri 13, 2022 11:38 pm

ACORNVALVE View the latest post

No unread posts Attachment(s) Adding antenna to a ferrite rod ??

6tom

8

722

May Fri 13, 2022 6:33 pm

Tube Radio View the latest post

No unread posts Attachment(s) what is this part on this Two Transistor Reflex Radio

6tom

6

666

May Mon 09, 2022 10:56 pm

6tom View the latest post

No unread posts Attachment(s) PLL Hum Cancellation Circuit

Dare4444

4

335

May Sun 08, 2022 7:53 am

OldWireBender View the latest post

No unread posts Attachment(s) Home-made analog FET milli-Volt meter project...

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xrhonda91

30

2300

May Fri 06, 2022 6:24 pm

xrhonda91 View the latest post

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