[Heath] SB 610 and SB 401 questions

[Robert Myers]

Hi Mark,

You don’t need the crystal pack in split mode if both frequencies are on the same band and you are connected to an SB-303.  In that case, the SB-401 and SB-303 (used in transceive mode, with frequency control set to UNLOCKED on the SB-401) has the SB-401 using oscillators from the SB-303 *except* for the LMO – which comes from the SB-401 during transmit.  When receiving in that mode, all oscillators (including the LMO) are from the SB-303.

So, I still claim you only need the optional 8-pack crystal set for the SB-401 when:
- splitting across differing bands (with something like an SB-303, as above); or, 
- if you want the SB-401 to be a stand-alone independent transmitter without something like the SB-303.

'Transceive mode' with the pair does not mean the same frequency only.

Cheers,
-- Rob
VE3JQL

From: Heath [mailto:heath-bounces at puck.nether.net] On Behalf Of Mark Johnson
Sent: March 3, 2016 8:37 AM
To: Guy Giacopuzzi <gggdds at js-net.com>
Cc: heath at puck.nether.net
Subject: Re: [Heath] SB 610 and SB 401 questions

Yes and no. You can use the SB 401 without the crystal pack if you operate with the SB 300, SB301 and SB303 receivers, with the pair in transceiver mode on the same frequency. If you ever want to operate in "split" mode, the SB 401 using its own LMO to control the transmit frequency, then you need the optional crystal pack.

And yes, if you use the SB 401 without a Heath receiver, the you also need the crystal pack.

Mark
VE3LU

Sent from my iPad

On Mar 3, 2016, at 8:02 AM, Guy Giacopuzzi <mailto:gggdds at js-net.com> wrote:
I think you only need the xtal set for the 401 if you're NOT using it with a matching receiver...i.e. and SB-300,301 or 303...I think you can even use the 401 as a "separate" on a different frequency when using one of these receivers and it will still work...
Guy
On 3/2/2016 7:20 PM, Jim's wrote:
Thanks Mark, I do have a couple of hw’s in various condition of repair and can use these. 
 
Jim 
 
From: Mark V Johnson [mailto:mvjohn at sympatico.ca] 
Sent: Wednesday, March 2, 2016 6:33 PM
To: 'Jim's' mailto:Jsutherin at roadrunner.com; mailto:heath at puck.nether.net
Subject: RE: [Heath] SB 610 and SB 401 questions
 
Jim, forgive me if I’m being obvious but a “crystal pack” for an SB-401 can be obtained from any Heath transceiver. I’ve been buying up HW-101’s for parts, such as the crystal sets, as the crystals do at times fail and HW-101 parts rigs are fairly plentiful and cheap. Chuck Penson in his Heathkit book, estimates that Heath made nearly 30, 000 HW-101 kits! Also, all SB-400’s came with the full set of crystals so if you can find an SB-400 parts rig, your good to go. 
 
From: Heath [mailto:heath-bounces at puck.nether.net] On Behalf Of Jim's
Sent: Wednesday, March 2, 2016 4:06 PM
To: mailto:heath at puck.nether.net
Subject: [Heath] SB 610 and SB 401 questions
 
I have a SB 610 that needs a new screen. Is there anyone that has one for sale or can describe how to refurbish the one I have? 
Also I am looking for a xtal set for a SB 401 
 
Thanks 73 
Jim K8DHC



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