Beginning a 37-620 Restoration

Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Linear Mode

morzh
Odobenus rosmarus

Posts: 18,427
Threads: 622
Joined: Oct 2011
City: Jackson State, Province, Country: NJ

#86

05-03-2026, 10:59 AM

Roy

https://philcoradio.com/phorum/showthrea...ight=zener

I used a SOT23 part so not to use two single diodes.
A dual Zener 5.6V with common Anode. Like this, 2BZX84C5V1
https://www.mouser.com/ProductDetail/Dio...rnVw%3D%3D

Another part that could be used is a Back-to-Back TVS diode like say this one, SY205208DXC .
https://www.mouser.com/ProductDetail/Sil...EDIg%3D%3D

Of course it makes little sense to order $0.25 part fro MOuser and pay $9 for shipping.

Things to keep in mind.
Regular Zeners have fairly large capacitance and will degrade the signal when it is of a fairly high frequency. It still is usable but will not be the same amplitude as low frequency.

To avoid that the TVS can be used, but the TVS is not made for constant clamping, it is a fairly high, but very short, energy pulse protection device. So while it will protect from a very short pule, it will not withstand prolonged exposure to clamping energy.

I use Zeners.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.

Find

« Next Oldest | Next Newest »

Messages In This Thread

Beginning a 37-620 Restoration - by glyphmon - 03-28-2026, 01:58 AM

RE: Beginning a 37-620 Restoration - by morzh - 03-28-2026, 09:03 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 03-28-2026, 09:28 AM

RE: Beginning a 37-620 Restoration - by RodB - 03-28-2026, 11:23 AM

RE: Beginning a 37-620 Restoration - by morzh - 03-28-2026, 03:29 PM

RE: Beginning a 37-620 Restoration - by morzh - 03-28-2026, 03:47 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 12:23 AM

RE: Beginning a 37-620 Restoration - by morzh - 03-29-2026, 10:10 AM

RE: Beginning a 37-620 Restoration - by DaleHCook - 03-29-2026, 10:27 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 11:07 AM

RE: Beginning a 37-620 Restoration - by RodB - 03-29-2026, 11:07 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 11:23 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 12:03 PM

RE: Beginning a 37-620 Restoration - by morzh - 03-29-2026, 12:09 PM

RE: Beginning a 37-620 Restoration - by DaleHCook - 03-29-2026, 12:46 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 02:20 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 02:28 PM

RE: Beginning a 37-620 Restoration - by morzh - 03-29-2026, 03:01 PM

RE: Beginning a 37-620 Restoration - by RodB - 03-29-2026, 03:22 PM

RE: Beginning a 37-620 Restoration - by RodB - 03-29-2026, 04:09 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 04:52 PM

RE: Beginning a 37-620 Restoration - by Arran - 03-29-2026, 05:02 PM

RE: Beginning a 37-620 Restoration - by Arran - 03-29-2026, 07:44 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 08:02 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-07-2026, 10:55 AM

RE: Beginning a 37-620 Restoration - by RodB - 04-07-2026, 01:05 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-07-2026, 01:24 PM

RE: Beginning a 37-620 Restoration - by RodB - 04-07-2026, 02:19 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-07-2026, 03:18 PM

RE: Beginning a 37-620 Restoration - by morzh - 04-07-2026, 03:30 PM

RE: Beginning a 37-620 Restoration - by RodB - 04-07-2026, 07:04 PM

RE: Beginning a 37-620 Restoration - by morzh - 04-07-2026, 07:22 PM

RE: Beginning a 37-620 Restoration - by RodB - 04-07-2026, 07:53 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-07-2026, 10:02 PM

RE: Beginning a 37-620 Restoration - by morzh - 04-07-2026, 10:20 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-08-2026, 12:13 AM

RE: Beginning a 37-620 Restoration - by morzh - 04-08-2026, 08:20 AM

RE: Beginning a 37-620 Restoration - by MrFixr55 - 04-08-2026, 08:39 AM

RE: Beginning a 37-620 Restoration - by Arran - 04-08-2026, 01:13 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-11-2026, 05:40 PM

RE: Beginning a 37-620 Restoration - by morzh - 04-11-2026, 07:52 PM

RE: Beginning a 37-620 Restoration - by SRv2 - 04-11-2026, 09:31 PM

RE: Beginning a 37-620 Restoration - by morzh - 04-11-2026, 10:25 PM

RE: Beginning a 37-620 Restoration - by MrFixr55 - 04-11-2026, 11:32 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-11-2026, 11:50 PM

RE: Beginning a 37-620 Restoration - by radiorich - 04-12-2026, 12:58 AM

462ron - by 462ron - 04-12-2026, 08:37 AM

RE: Beginning a 37-620 Restoration - by morzh - 04-12-2026, 10:44 AM

RE: Beginning a 37-620 Restoration - by RodB - 04-12-2026, 11:31 AM

RE: Beginning a 37-620 Restoration - by SRv2 - 04-12-2026, 06:26 PM

RE: Beginning a 37-620 Restoration - by morzh - 04-12-2026, 07:51 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-12-2026, 09:10 PM

RE: Beginning a 37-620 Restoration - by SRv2 - 04-12-2026, 09:26 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-12-2026, 10:21 PM

RE: Beginning a 37-620 Restoration - by radiorich - 04-12-2026, 11:11 PM

462ron - by 462ron - 04-13-2026, 07:15 AM

RE: Beginning a 37-620 Restoration - by morzh - 04-13-2026, 07:58 AM

RE: Beginning a 37-620 Restoration - by MrFixr55 - 04-13-2026, 09:22 AM

RE: Beginning a 37-620 Restoration - by RodB - 04-13-2026, 11:12 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-20-2026, 10:42 PM

RE: Beginning a 37-620 Restoration - by morzh - 04-20-2026, 10:48 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-20-2026, 10:55 PM

RE: Beginning a 37-620 Restoration - by DaleHCook - 04-21-2026, 07:07 AM

RE: Beginning a 37-620 Restoration - by morzh - 04-21-2026, 08:09 AM

RE: Beginning a 37-620 Restoration - by morzh - 04-21-2026, 08:12 AM

RE: Beginning a 37-620 Restoration - by DaleHCook - 04-21-2026, 08:22 AM

RE: Beginning a 37-620 Restoration - by radiorich - 04-21-2026, 08:28 AM

RE: Beginning a 37-620 Restoration - by DaleHCook - 04-21-2026, 01:54 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-21-2026, 03:29 PM

RE: Beginning a 37-620 Restoration - by Joe Rossi - 04-21-2026, 03:45 PM

RE: Beginning a 37-620 Restoration - by morzh - 04-21-2026, 04:47 PM

RE: Beginning a 37-620 Restoration - by RodB - 04-21-2026, 05:17 PM

RE: Beginning a 37-620 Restoration - by Arran - 04-21-2026, 05:44 PM

RE: Beginning a 37-620 Restoration - by morzh - 04-21-2026, 06:40 PM

RE: Beginning a 37-620 Restoration - by RodB - 04-21-2026, 07:10 PM

RE: Beginning a 37-620 Restoration - by morzh - 04-21-2026, 08:06 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-21-2026, 09:06 PM

RE: Beginning a 37-620 Restoration - by morzh - 04-21-2026, 10:16 PM

462ron - by 462ron - 04-22-2026, 07:33 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 04-28-2026, 11:44 PM

RE: Beginning a 37-620 Restoration - by morzh - 04-29-2026, 08:04 AM

RE: Beginning a 37-620 Restoration - by DaleHCook - 04-29-2026, 08:35 AM

RE: Beginning a 37-620 Restoration - by RodB - 04-29-2026, 11:37 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 05-02-2026, 11:05 PM

RE: Beginning a 37-620 Restoration - by RodB - 05-03-2026, 09:22 AM

RE: Beginning a 37-620 Restoration - by morzh - 05-03-2026, 10:59 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 08-06-2026, 07:39 PM

RE: Beginning a 37-620 Restoration - by morzh - 08-07-2026, 01:40 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 08-07-2026, 05:21 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 09-10-2026, 08:15 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 09-13-2026, 02:26 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 09-23-2026, 09:05 PM

RE: Beginning a 37-620 Restoration - by MrFixr55 - 09-24-2026, 02:19 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 09-24-2026, 10:01 AM

RE: Beginning a 37-620 Restoration - by MrFixr55 - 09-25-2026, 10:45 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 09-25-2026, 11:50 AM

RE: Beginning a 37-620 Restoration - by MrFixr55 - 09-25-2026, 05:44 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 09-25-2026, 11:14 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 10-03-2026, 09:54 PM

RE: Beginning a 37-620 Restoration - by MrFixr55 - 10-03-2026, 10:31 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 10-03-2026, 10:39 PM

RE: Beginning a 37-620 Restoration - by radiorich - 10-03-2026, 11:59 PM

RE: Beginning a 37-620 Restoration - by MrFixr55 - 10-04-2026, 08:34 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 10-04-2026, 10:20 AM

RE: Beginning a 37-620 Restoration - by radiorich - 10-04-2026, 11:59 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 10-04-2026, 12:51 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 10-04-2026, 07:47 PM

RE: Beginning a 37-620 Restoration - by MrFixr55 - 10-04-2026, 08:49 PM

RE: Beginning a 37-620 Restoration - by radiorich - 10-04-2026, 09:12 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 10-04-2026, 10:14 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 10-05-2026, 10:05 PM

RE: Beginning a 37-620 Restoration - by MrFixr55 - 10-05-2026, 10:20 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 10-05-2026, 10:42 PM

RE: Beginning a 37-620 Restoration - by radiorich - 10-06-2026, 12:16 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 10-06-2026, 12:59 AM

RE: Beginning a 37-620 Restoration - by MrFixr55 - 10-06-2026, 07:50 AM

462ron - by 462ron - 10-06-2026, 08:12 AM

RE: Beginning a 37-620 Restoration - by MrFixr55 - 10-06-2026, 08:15 AM

RE: Beginning a 37-620 Restoration - by glyphmon - 10-07-2026, 03:55 PM

RE: Beginning a 37-620 Restoration - by glyphmon - 10-10-2026, 03:47 PM

View a Printable Version

Users browsing this thread: 3 Guest(s)

Recent Posts
under chassis parts locator diagram for 1938 Zenith 9s262
Has anyone gone to the trouble of creating an under chassis parts locator image? Yes, I can identify components by foll...bobloney — 08:57 PM
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
Try looking at this site the book mark is for a old generator that I was given. David https://radionerds.com/index.ph...David — 08:36 PM
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
Hello Everyone, I am looking for voltage identification for all the pin positions on the socket of a CRV-20130 power su...Tonym4704 — 08:16 PM
Philco P45-6365 Universal Transformer Instruction Manual
Can anyone guide me to where this may be found?GRG — 03:00 PM
54C Complete Teardown/Rebuild
I don't think that I have encountered a 12Z3 before, curious how it uses one of those but includes a #43, which is a 25 ...Arran — 02:17 PM
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello, I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same. I find myself wanting to find some way to block out the...glyphmon — 12:03 AM

Who's Online

There are currently 1928 online users. [Complete List]
» 1 Member(s) | 1927 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me