- 1. [Amps] SB220 Sick (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Wed, 07 Apr 2010 08:43:32 -0700
- HI all Need some help. I have a friends SB220 that does not accept RF drive. Following info 1) Plate voltage good at tubes 2) Looks like 30 ohm parasitic resistors/cap (aftermarket) are good, both tu
- /archives//html/Amps/2010-04/msg00202.html (7,372 bytes)
- 2. [Amps] SB220 SICK...RELAY (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Wed, 07 Apr 2010 14:26:37 -0700
- Thanks to all for your inputs. I am going to try cleaning the relay contacts and watch alignment, etc. If I can't get it going (contacts beyond repair), I would like to replace the relay but a quick
- /archives//html/Amps/2010-04/msg00229.html (7,510 bytes)
- 3. [Amps] Relay Speed UP Circuit (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Fri, 16 Apr 2010 09:40:56 -0700
- I have been looking at the K1KP (K6XX) relay speed up circuit and I am not quite following the his description he has on his website. Anyone understand what's going on? How does anything placed in se
- /archives//html/Amps/2010-04/msg00481.html (6,501 bytes)
- 4. [Amps] Band Decoder, TS950 (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Wed, 21 Apr 2010 14:32:38 -0700
- I am presently using a homebrew decoder for my Kenwood TS950 to read the RS232 data (using a STAMP chip) and setting the proper outputs (multiple "IF" conditions on reading the RS232 data) to drive m
- /archives//html/Amps/2010-04/msg00595.html (7,213 bytes)
- 5. [Amps] SB220 SB221 Multimeter OPEN (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Tue, 18 May 2010 18:36:32 -0700
- Anyone have one of these? What is the meter's DC resistance? Has anyone come up with a substitute movement or meter? I'll start searching the web now...... The amp still works fine but I have lost al
- /archives//html/Amps/2010-05/msg00188.html (6,523 bytes)
- 6. [Amps] Relay Driver (Chip) (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Sun, 23 May 2010 14:07:45 -0700
- Folks I am using the W9XT band decoder board to interface to a Yaesu radio for a local ham friend. All going well until I found out the switching box he ordered is an Array Solutions 6 pack. 1) The o
- /archives//html/Amps/2010-05/msg00346.html (7,205 bytes)
- 7. [Amps] RF Choke (Safety), SB220 (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Mon, 07 Jun 2010 22:20:34 -0700
- I accidently blew the safety RF choke (1 mh, multi Pi section) on a SB220 output. I witnessed what they are suppose to do..quite interesting, but an unwanted "successful test" of its function...nice
- /archives//html/Amps/2010-06/msg00081.html (6,564 bytes)
- 8. [Amps] Software Guru Sought (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Sat, 10 Jul 2010 15:31:13 -0700
- Hi Guys Though not amp related, I am seeking someone who can code a BASIC STAMP chip to issue a read frequency command to ICOM and Kenwood rigs, read the results and then output XXXX BCD data that is
- /archives//html/Amps/2010-07/msg00100.html (6,551 bytes)
- 9. [Amps] Any Circuit guys out there (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Wed, 11 Aug 2010 19:42:37 -0700
- Folks I have problem that looks simple to correct but the obvious isn't working or its the infamous "tree in the forest scenario". NOTE: Logic is CMOS The circuit is a PNP transistor switch being dri
- /archives//html/Amps/2010-08/msg00168.html (10,033 bytes)
- 10. [Amps] The circuit bug found (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Mon, 16 Aug 2010 16:09:28 -0700
- To all who sent advise, be advised the "bug" has been found. To those that looked at the circuit, it appeared the steering diode wouldn't stop the voltage from backing into the OR gate. Concerns were
- /archives//html/Amps/2010-08/msg00274.html (6,668 bytes)
- 11. [Amps] Reading data sheet right? (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Tue, 17 Aug 2010 09:28:37 -0700
- Hi all I am looking for confirmation that I am reading the data sheet right for a chip (Fairchild). The chip is a CD4081 (CMOS) and I need to pull the input down to a "0" when the input circuitry to
- /archives//html/Amps/2010-08/msg00277.html (7,402 bytes)
- 12. Re: [Amps] Can I cool too much the tubes? (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Thu, 19 Aug 2010 22:04:46 -0700
- I did the same for my 30L1 for a decade which always ran REALLY hot to the touch. The muffin fan really reduced overall temp Jay W2IJ _______________________________________________ Amps mailing list
- /archives//html/Amps/2010-08/msg00334.html (12,819 bytes)
- 13. [Amps] Fan for SB220 (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Thu, 16 Dec 2010 19:30:32 -0800
- A local ham buddy just got back into the hobby after an 8 year hiatus and got a hold of 2 SB220's. He noticed they run hot and he asked the following question...so I figured there are folks out here
- /archives//html/Amps/2010-12/msg00177.html (7,202 bytes)
- 14. Re: [Amps] Fan for SB220 (score: 1)
- Author: "JayKay" <pcb4u@verizon.net>
- Date: Thu, 16 Dec 2010 19:33:41 -0800
- OK it wasn't a "small muffin"....it was a muffin fan HI HI Jay _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
- /archives//html/Amps/2010-12/msg00178.html (7,575 bytes)
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