[DSP-10] 8-Watt "Brickette" Amplifier

[Bob Larkin]

Hi Doug,

The amplifier question keeps coming up.  It would be great if we could 
get a full soulution to the module not being available any more.  The 
boards can still be purchased from ExpressPCB thanks to Mike, 
KD7TS---see the main DSP-10 web page.

Here is an idea.  It appears that the Mitsubishi RA08H1317M would 
functionally do the job.  It needs changes for the DC voltages (pin 
locations and bias level), and it is physically smaller than the old 
module.  Also, the drive from some DSP-10s can exceed the 40 mW max 
rating, but a simple shunt resistor could provide safety, I suspect.  It 
is rated 16VDC max, so that should be OK. If somebody wanted to change 
the existing board design, I would be available to support the effort by 
email, and could also do testing of various issues including IM levels.  
Some level of group buy would then need to be coordinated by 
somebody---any volunteers?  A group buy also gives a way to pay for the 
prototyper's PCB costs.

I looked at the ExpressPCB page, and it seems like we could get 50 
boards for less than $10 each.  In 50's, the modules are around $16 and 
the nifty Hammond 1590BB boxes are around $11 painted black.  Seems like 
the costs are not out of control for a group buy.  I have no idea how 
much interest there is---50 may be unreasonable??

Any thoughts?


On 11/10/2013 09:55 AM, Doug Yuill wrote:
> Hi Bob et al,
>
> I've always admired the DSP-10, both for its design, but also for its
> execution.
> I'm not sure how many TAPR sold, but in my opinion, it takes the cake as
> the best kit ever offered!
>
> As such, I've purchased a partial DSP-10 kit from Dan Boardman which I'm
> waiting to arrive in the mail. His brother has assembled most of it, so
> hopefully I can complete it quickly!
>
> Question: Do you know anyone with a spare PCB and or parts for the 8-Watt
> "Brickette" Amplifier?
>
> If not, are there any alternate amplifier solutions available that you can
> suggest?
>
> Looking forward to trying an AOR Digital Voice over HF contact with you on
> 20-metres sometime!
>
> de VE3OCU in Ottawa
> ****************************
> Doug Yuill; My greatest learning lies ahead.
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