I’m not seeing this problem. [Non-text portions of this message have been removed]

Five copies of the following message arrived in my inbox time stamped 3:20 AM, 3:21 AM, 3:21 AM, 3:22 AM, 3:23 AM: Hello, This email message is a notification to let you know that a file has

A MESSAGE TO ALL: There is a "message linking " problem in this group. I don't know if it coming from me or not. For this forum I am using Yahoo Mail via an old ATT email account. I no longer use ATT

Hi, Just found open CRT filaments on my SC504. Want to buy or trade for 154-0730-05 or 154-0859-01 jerry

Hi Alberto, not exactly your mechanical question, but the destroyed 0.1uF/22Ohm filter in my 7904A was located at a circuit board, not in or at the AC power socket. Located where the big blue Sprague

Dear friends, I come back to you from the start of this conversation, with my update: (good news) I completed the plug-in setup with two loaned 7A26 amplifiers, I switched on my 7904A and it run!

Bob, Thanks for the price quote but that is above my budget. I am still interested in the handle for a 24xx scope. Roger

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the TekScopes group. File : /"new" Tek 7904A/IMG_4420_800x600.jpg Uploaded

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the TekScopes group. File : /"new" Tek 7904A/IMG_4424_600x800.jpg Uploaded

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the TekScopes group. File : /"new" Tek 7904A/IMG_4423_800x600.jpg Uploaded

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the TekScopes group. File : /"new" Tek 7904A/IMG_4422_800x600.jpg Uploaded

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the TekScopes group. File : /"new" Tek 7904A/IMG_4421_800x600.jpg Uploaded

Be warned about Ft statements in datasheets unless the datasheet says Ft (typical) of 0.2MHz, then you should read that as Ft(min) of 0.2MHz (which could mean 100MHz). Ask me how I know :) (hint

Thanks, I unfortunately never figured out how to mess with magnet: BT links with Linux yet. However I got a copy from Mike U. and now a lot of the ongoing experiments make more sense.

The circuit looks like an intrinsic base capacitance + inductance of 6-7 winding of the transformer LC Armstrong oscillator. I couldn't find typical intrinsic capacitance of the base of these

David and Group, OK I will do that. My experience tells me that usually a problem can be traced to a single fault unless the fault causes a cascade of failures. The Q14009 transistor was definitely

While you are waiting for those parts to show up, I suggest checking the rest of the transistors in the regulator circuit for at least shorts and opens. I would also look for bad resistors. My

David and Group, Thanks again for your excellent help! Now I just need to wait for the part to arrive. Will update status when I retest with the new part. Regards, Rob  Sent from Yahoo Mail. Get the

Just check the specifications for the part from that specific manufacturer. I thought all 2N3773s were the old 0.2 MHz types until today. The 2N3771 and 2N3772 transistors which I linked from

David and Group, I place an order thru Digi-Key for qty 2 of the 2N3773 ($3.72 ea) which the spec sheet lists an Ft of .2 Mhz. I also order qty 1 of 2N3053 ($1.91) in case Q4008 is bad. Thanks and