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  1. 73's de Edd

    B & O Penta amplifier repair and Tr equivalents

    Sir punkieys17 . . . . . . . Yep . . .with that R94 and R95 (rheostat wired) . . . . series pair . . . .you know the very first one to suspicion / sniff . . . . . . .ahhhhhhhh . . . . smell that invigorating aroma . . . . phenol in the morning. 73's de Edd
  2. 73's de Edd

    I want to replace a noisy capacitor in a TV

    Sir "Capsolderer" . . . . . . . I also totally concur . . . . that 2W metal film curent limiting / sampling resistor is definitely going to be a better "heater" than a "hummer" . Also, any time that you are performing a very LOW resistance reading, you initially want to short your test...
  3. 73's de Edd

    joined/connected pads

    Sir Cart . . . . . . . Don't get confused . . .since I have TOTALLY flipped your board HORIZONTALLY in order to coincide with the top component overlay placed just below. Looks like you have successfully soldered on the R1 dropping resistor and the D2 diodes anode at RED A junction as well...
  4. 73's de Edd

    Help with a simple receiver.

    Sir Lash . . . . . Wel l l l l l . . . . it looks like the 200K is present to provide forward biasing of the NPN transistor to make it an amplifier . The .22 ufd is there to filter out any remaining RF from the audio that is about to activate the earphone. The 4.7 ufd cap is there to make the...
  5. 73's de Edd

    Help for test uc3845

    . Yep . . . . .that circuit was what I built up on a custom built board with an I.C. plug in socket for testing those devices to evaluate one to see if it was basically good. Seems like that family was introduced in the mid-late nineties. A 100 ohm load resistor was used to present a...
  6. 73's de Edd

    First Post - Help with Identifying Circuit Components

    Greetings . . . . . .kind Sires . . . . . . . . "Maybe you missed the comment in one of the earlier posts that the switch has a LOW, OFF, and HIGH settings" Exactly . . .I did . . .but now with that forthcoming info, I readily see the shunting of that resistor to establish TWO different...
  7. 73's de Edd

    Help for test uc3845

    . Sir Oldsnake00 . . . . . . If I am reading between the lines and you are basically wanting to test a UC3845 of yours. The simplest way I know is to refer to the old Unitrode Switchmode Design Manual and breadboard up and try out the simplistic circuit of figure 28 on Page 3-64 of the...
  8. 73's de Edd

    First Post - Help with Identifying Circuit Components

    . Sir Hobby Junkie . . . . . . . Session Deux . . . . . I was able to make out enough on the first viewing of your reverse engineered drawing and mark in changes and add some info right on your schematic sheet . First of all . . .might this just be an internal dedicated ancillary circuit...
  9. 73's de Edd

    First Post - Help with Identifying Circuit Components

    Sir Hobby Junkie . . . . . The 5AW transistor should be having the PD sampling going into its base , reverse your 5AW B-E markings. I am going to have to split this up into two sessions but the info on two of the three are below, plus the last ? one : 5AW info...
  10. 73's de Edd

    Comedy Thread

    Waaaaaaaah . . . . .Mom just got run over with a battery:
  11. 73's de Edd

    bad screen

    mountaindew X marks the spots . . . . . . . . . . . .do you have any "kids" with b-b guns ?
  12. 73's de Edd

    Panasonic SC-BT730 doesn't turn on - error F61

    . Sir pkouzm. . . . . . . " I found that F61 error means problems with Fan" Heh . . .heh . . .heh . . . I wonder just how many people are fooled by that fan . . . . . with its stilled blades? Seems like a nephew of mine presented me with his "Puny-sonic" unit back in very early...
  13. 73's de Edd

    Panasonic SC-BT730 doesn't turn on - error F61

    . Sir pkouzm . . . . . . . How about checking with some older info on a similar unit at this site and see if any info is relevant to your units situation. PLUS . . . .below . . . . I am giving you the master plan to the evil plot of the elusive and "dreaded F61" error. And it seems like...
  14. 73's de Edd

    Trying to Attach Momentary Push Buttons (Rocker-Type) to a circuit board with Silicone Buttons.???

    . . Sir Frank Tank . . . .et al . . . . . . . Hmmmmmm . . . .let me take just a moment to check in my catalog here . . . . . . Yep . . . .looks like it has always been called magnet wire . . . .or a proper variant might just possibly be . . . . . enamel insulated copper wire . But...
  15. 73's de Edd

    Small DC TIG welder remote switch needed

    . Sir Clambake. . . . . . . " By the way -turns out the relay is oriented horizontally. "A1" and "A2" marked on the photo on page 3 are actually the coil pins. "C1" and "C2" are a small cap. " Go ye now and VEWY-VEWY-VEWY carefully inspect that relay again,. both referencing to the PCB and...
  16. 73's de Edd

    Trying to Attach Momentary Push Buttons (Rocker-Type) to a circuit board with Silicone Buttons.???

    . Sir Frank Tank . . . . . . . Post Addenda . . . . . .Initially poked up on laptop, earlier, prior to 2 added comments . . . . just had to get back to civilization for my image generation and its add on to post. GOOD JOB . . .on the photos ! . . .now I won't have to expound upon the...
  17. 73's de Edd

    Mulitmeter

    . Sir Jimmie . . . . . With you having a closed loop circuit, and with your being able to get that meter deflection, I would not suspicion a fuse. I am providing two references . . .with the first just permitting us to view the units switching functions and their layout. The second is NOT your...
  18. 73's de Edd

    JD5 smd compnent

    Sir electronika.design . . . . . . . JD-JD5-D5 won't validate thru 3 sources of ~5000 listings of each of my SM code referencing sources, when compared against that units packaging. Possibly give us the units brand and model and a just a little bit more adjunct parts imaging . Plus do a...
  19. 73's de Edd

    I have a Realalistics Turntable Lab330......I would like to know how to adjust my on the machine to

    Gerri Davis . . . . . . . Save your needle change until LAST . With it being of a circa 68 vintage unit . . . .Does the turntable seem to hold a uniform speed, as confirmed by the strobe at the front ? If you hold the arm up and support it OFF the record and slowly move it towards the...
  20. 73's de Edd

    Small DC TIG welder remote switch needed

    . Sir Clambake. . . . . . . Since you now can find the relay coil connections with my info, do that tack soldering and remoting out two wires to be able to monitor the relays voltage in different conditions and thereby, be able to associate "cause and effect". That resultant end info...
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