[Drakelist] R-4A Notch trouble

Hi My R-4A project is puzzling me. It sounds ok, but when I go through the adjustment procedure I'm puzzled. The book says thet the tuning of T7 andT10 is quite broad. For sure, I can't get a maximum at all. And the notch will not work. There is absolutely no response to any setting of the

[Drakelist] R-4A working

Hi all I promised to let you know what happened to my R-4A (13-tube). I made the pcb for the xtal oscillator that was missing (fiberglass, not phenolic , I'm not religious), collected the parts including a 2N3904 as a replacement for the 2N3394. After some experimenting, I ended up making

[Drakelist] R-4A calibrator

Hi all My R-4A I was telling you about has the old type calibrator, with a 12BA6. That was one of the changes to the B, the introduction of integrated circuits in the calibrator. As I said, there is no signal at all, I have resoldered, changed the tube and the trimmer cap and still there is

[Drakelist] R-4A osc (cont.)

Hi all, and tnx for tips. I have tried to make the L4 on a 3/8 resistor (120k), and get signal through on 80 m. The oscillator will not oscillate on the other frequencies at all, and the thing is very sensitive to stray capacitances. So something is wrong. I will try to measure the L4 from

[Drakelist] R-4A osc

Hi all I am i the process of restoring a R-4A s/n 3092 I got the other day. his particular receiver have been used as parts radio at one time, and the part that has been removed is the crystal oscillator board. I have to make a new one, and this task shouldn't cause too much trouble if it

[Drakelist] Band crystals

Hello group. Got hold of an old T-4X that have been used for parts some time ago. Thought the whole project was impossible, but looking more closely at it I saw that it was quite nice. The vfo was dismounted, but there. The PA cage wasn't, but I had a spare for an old TR-4 lying around. The

SV: [drakelist] Drake Mic. 1077

Karl Henrik Laache [EMAIL PROTECTED] made an utterance to the drakelist gang -- Astatic exists: http://www.astaticinstalled.com/ 73s de Karl LA1CU -Opprinnelig melding- Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED

SV: [drakelist] Testing tubes

Karl Henrik Laache [EMAIL PROTECTED] made an utterance to the drakelist gang -- Try this site: http://www.nj7p.org/Tube.php This is one great site for substites and general tube data. 73s de Karl LA1CU -Opprinnelig

SV: [drakelist] An Introduction a question about keyer for T-4XB

Karl Henrik Laache [EMAIL PROTECTED] made an utterance to the drakelist gang -- Try to change the electrolytic caps, esp in the neg bias circuit. 73s de Karl LA1CU -Opprinnelig melding- Fra: [EMAIL PROTECTED] [mailto

SV: [drakelist] That e-bay shark....

Hi all I'm sorry that I've offended some of you by trying to moderate. That won't happen again. Thanks to Thom for a great list. The Drakes interest me, and I have a few. I will keep to the tech issues in the future. 73's de Karl LA1CU

[drakelist] L4-L4B-L7

Karl Henrik Laache [EMAIL PROTECTED] made an utterance to the drakelist gang -- Hi group The L-4 amp came standard with 3-400Z tubes and chimneys. The L-4B came with 3-500Z tubes and chimneys. In addition the -B included

[drakelist] Neutralizing

Hi group Thanks for the answers, but I didnt gett he answer I wanted, though. Although inspired by the prices of Sylvania 6JB6, my interest moved to the more technical side of the neutralizing process. The neutralizing is described in the compendium from Eimac

[drakelist] Neutralizing

Hi group I have tried different substitute PA-tubes for my T-4XB, because the 6JB6s are becoming quite expensive here in Norway. The types tried are 6KM6, 6JF6 and 6GJ5. But there seems to be a problem with neutralization of certain tubes. Specifically the 6KM6 and 6JF6. The 6GJ5s

[drakelist] Neutralizing

Hi group I have tried different substitute PA-tubes for my T-4XB, because the 6JB6s are becoming quite expensive here in Norway. The types tried are 6KM6, 6JF6 and 6GJ5. But there seems to be a problem with neutralization of certain tubes. Specifically the 6KM6 and 6JF6. The 6GJ5s

SV: [drakelist] FS4 injection cable

Karl Henrik Laache [EMAIL PROTECTED] made an utterance to the drakelist gang -- Med vennlig hilsen/Best regards Karl Henrik Laache Låke gård 2030 Nannestad Tlf. +4763997285 Fax +4763997009 E-post: [EMAIL PROTECTED

SV: [drakelist] FS4 injection cable

Karl Henrik Laache [EMAIL PROTECTED] made an utterance to the drakelist gang -- I've got a NIB FS-4 with all the original cables, stickers etc. The inj. cable is an unmarked grey cable, probably an audio cable with a RCA/phono

SV: [drakelist] FS4 injection cable

Karl Henrik Laache [EMAIL PROTECTED] made an utterance to the drakelist gang -- I've got a NIB FS-4 with all the original cables, stickers etc. The inj. cable is an unmarked grey cable, probably an audio cable with a RCA/phono

[drakelist] Sidetone T-4XB

Thanks for good advice in this matter about the sidetone. I tried a 32mmF cap across the C129, and then everything worked as it should. Next step is to recap the whole line. 73's de LA1CU Karl email: [EMAIL PROTECTED]

[drakelist] New to the list

Hi all Im new to the list, and have a B-line Im putting on air again. The xmtr works fine with one exception: When in CW-mode There is a sidetone all the time. This sidetone should be grounded when the key is up, but obviously isnt. The adjustment of the VOX delay is very difficult. When