Re: [Elecraft] K3 and amplifiers such as ALS-600

2009-07-22 Thread HowardZ
Is it best to use a buffer send/ptt device like the Ameritron ARB-704 with the K3? Howard -- View this message in context: http://n2.nabble.com/K3-and-amplifiers-such-as-ALS-600-tp3300117p3303890.html Sent from the Elecraft mailing list archive at Nabble.com.

Re: [Elecraft] K3 and amplifiers such as ALS-600

2009-07-22 Thread Lee Buller
Common Sense, ask for help from somebody who has some Common Sense. Is Common Sense divine? From: HowardZ howa...@howardz.com To: elecraft@mailman.qth.net Sent: Wednesday, July 22, 2009 10:16:01 AM Subject: Re: [Elecraft] K3 and amplifiers such as ALS-600

Re: [Elecraft] K3 and amplifiers such as ALS-600

2009-07-22 Thread Phil Debbie Salas
Is it best to use a buffer send/ptt device like the Ameritron ARB-704 with the K3? Not necessary. The ALS-600 keying input has an open circuit voltage of 12VDC, and requires you to sink 100ma (or 70ma with the QSK mod) to key the amp. Easily handled by the K3 amp-key RCA output. If you have

Re: [Elecraft] K3 and amplifiers such as ALS-600

2009-07-22 Thread .k8dd.
HowardZ wrote: Is it best to use a buffer send/ptt device like the Ameritron ARB-704 with the K3? Howard Depends on the amp. ALS-600 - no Unmodified SB-200/220 - yes FL2100 - yes Basically put - check the voltage on the amp's relay line. If it is AC, or a higher voltage, or if it is

Re: [Elecraft] K3 and amplifiers such as ALS-600

2009-07-22 Thread Ignacy
One of frequent authors in QST runs ALS600 with K2/10. He removed most of the input resistors in ALS600 to boost amplification and runs almost full power with QRP drive. Probably the same can be done for for K3/10W. Ignacy, NO9E -- View this message in context:

Re: [Elecraft] K3 and amplifiers such as ALS-600

2009-07-22 Thread Jim Miller KG0KP
2:23 PM Subject: Re: [Elecraft] K3 and amplifiers such as ALS-600 One of frequent authors in QST runs ALS600 with K2/10. He removed most of the input resistors in ALS600 to boost amplification and runs almost full power with QRP drive. Probably the same can be done for for K3/10W. Ignacy

Re: [Elecraft] K3 and amplifiers such as ALS-600

2009-07-22 Thread Mark Bayern
Amplifiers are not such that 100 = 500 so 10 = 50. Solid state at least, look at the charts for the 2 meter amps for instance) Doesn't work that way. _Linear_ amplifiers do hold true to the 100in=500out, so 10in=50out statement. If they are not linear amps, don't use them for anything other

Re: [Elecraft] K3 and amplifiers such as ALS-600

2009-07-22 Thread Ignacy Misztal
MRF150 as used in ALS600 has 17db linear gain at 30MHz, and +20db on 20MHz and below. The gain is reduced to 9-11db across the bands by swamping the input and by some feedback. It can be recovered by using smaller or no input resistor and by removing or reducing the feedback with a risk of some

[Elecraft] K3 and amplifiers such as ALS-600

2009-07-21 Thread Doug Person
I was wondering if anyone has used the K3 with the Ameritron ALS-600. Any issues, gotchas, etc? Doug -- K0DXV __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

Re: [Elecraft] K3 and amplifiers such as ALS-600

2009-07-21 Thread Steve Ellington
elecraft@mailman.qth.net Sent: Tuesday, July 21, 2009 2:13 PM Subject: [Elecraft] K3 and amplifiers such as ALS-600 I was wondering if anyone has used the K3 with the Ameritron ALS-600. Any issues, gotchas, etc? Doug -- K0DXV

Re: [Elecraft] K3 and amplifiers such as ALS-600

2009-07-21 Thread Roger Stein
and amplifiers such as ALS-600 I was wondering if anyone has used the K3 with the Ameritron ALS-600. Any issues, gotchas, etc? Doug -- K0DXV __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help

Re: [Elecraft] K3 and amplifiers such as ALS-600

2009-07-21 Thread Monty Shultes
Doug - I bought an older ALS-600 and put Phil Silas' QSK mod in it. It works beautifully. 60 watts' drive for full output. If I wanted to make it change bands from the K3, Ameritron tells me a $350 mod plus $119 interface would be needed. So you may want to look for a new or newer one

Re: [Elecraft] K3 and amplifiers such as ALS-600

2009-07-21 Thread Doug Person
Monty, Actually, I have a new one. And I have an MFJ-994B auto-tuner in front of it. My current main rig is an Icom IC756Pro3 - which I love. I had an early K3 and when the economy tanked I had to sell it. Now that I'm back on a more even footing I decided I can't live without another K3.